JP3816598B2 - Navigation device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a navigation device that searches for a movement path of a ground mobile body based on map information and transmits information about the movement path to a mobile operator. In particular, the present invention relates to a navigation apparatus with improved map information display and a medium storing a computer program for navigation processing.
[0002]
[Prior art]
In a conventional navigation device, a map of an area desired by a user is displayed on a display device. A destination desired by the user is set using the displayed map. Then, an optimum guide route connecting the set destination and the current position of the vehicle is searched using each road information recorded in advance.
[0003]
The retrieved guidance route is clearly displayed on a map displayed on the display device. While the vehicle is moving along the guide route, information necessary for traveling is notified to the user by means of listening means such as voice.
[0004]
Further, in the conventional navigation device, a route search from the current position of the vehicle to the destination is performed, and route guidance is performed based on the searched route. When a request for searching for a route different from the route currently being guided is input while traveling along this route, the route search is executed under a search condition different from the current route. The The searched route is set as a new guide route. In this different route search, the search cost is increased for the currently running road, or the search is performed again under different conditions from the search conditions (weighting of road data at the time of search) when searching for the route currently being guided. As a result, a route constituted by roads avoiding the currently traveling road is searched for as a new guide route.
[0005]
In addition, when the vehicle travels off the guide route, the conventional device has an auto-reroute function that automatically re-searches a new route from the current vehicle position when it is recognized that the vehicle is off the route. . Alternatively, there is a function of having a key for starting a re-search and executing the re-search when the key is operated. In this conventional apparatus, the first re-search route that deviates from the guide route displays the peripheral search route (the route searched to return to the original route), and further, according to the user's request, the entire route search route ( It is possible to post a new search route to the destination.
[0006]
[Problems to be solved by the invention]
In the conventional navigation device, one map is displayed on the entire screen of the display device. However, in recent years, the unit price of liquid crystal displays has been decreasing. Therefore, a display device having a wide display screen can be used. Thus, when a map is displayed on a display device having a wide display screen, geographic information in a wider range can be obtained. Moreover, if a wide screen is used, it is possible to display an enlarged map including more detailed geographical information.
[0007]
However, even if a wide screen is used, the combination of destination or stopover settings and the necessary search condition information can be displayed sufficiently if a part of the screen is used. It is hard to say that it is being used for.
[0008]
Also, if you specify one of the required search conditions, the screen will change, so if you want to check the previous specified conditions, you must go back to the previous screen or return to the first input screen. The operation was complicated.
[0009]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, in the present invention described in claim 1, the location of the facility searched together with the map display is displayed, and the map is displayed on a plurality of map display screens corresponding to each of the plurality of search conditions. The location of the facility extracted together with the display is displayed on one screen.
In the present invention described in claim 2, the location of the searched facility is displayed together with the map display, and the map display is displayed on a plurality of map display screens corresponding to each of the designated first and second search conditions. The location of the extracted facility is displayed on one screen.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
1. Summary of Examples
One embodiment of the navigation device described below searches a plurality of stored geographical object locations and information representing the geographical objects (step SX8, FIG. 49). SX22, steps SX76, SX80, SX84 in FIG. 64), at least one search condition is set for this search, the search result of the search is output, and the display screen of the display means is divided into two or more screens. The information is divided (step SX10 in FIG. 49), and different information of the search conditions and / or search results is displayed on each of the divided display screens (steps SX4, SX12, SX14, SX20, FIG. 49). SX22, steps SX62 and SX64 in FIG. 64, step SX94 in FIG. 65, steps SX122 and SX123 in FIG. Step in Figure 67 SX132, SX140, SX141, SX146, SX147) be characterized.
[0011]
In one embodiment of the navigation device described below, in addition to the above features, each of the divided display screens displays the search condition and the search result, or each of the divided display screens includes: The intermediate results and final results of the search are displayed (FIG. 73, etc.), or a plurality of different search conditions among the search conditions are displayed on each of the divided display surfaces (Step SX4 in FIG. 49, Step SX14, Step SX20, Step SX64 in FIG. 64, Step SX72, Step SX80, Step SX84, Step SX112 in FIG. 66, Step SX132 in FIG. 67, Step SX140, Step SX141, etc.) or each of the divided display screens Each of the search results searched according to the different search conditions is displayed (see FIG. 49). SX12, step SX22, step SX94 in FIG. 65, step SX122 in FIG. 66, step SX146 in FIG. 67, etc.), or any of these search conditions and search results, respectively, or in accordance with a series of search procedures Among the plurality of search processes to be executed, a plurality of newer search process contents are displayed along the search procedure.
[0012]
In addition to the above features, one embodiment of the navigation device described below searches for a route to a destination or stopover (step SA4 in FIG. 5), and guides information based on the searched route. (Step SA5 in FIG. 5), and the location of the multiple geographical objects and the information representing the geographical objects are internal information (in step SX4 in FIG. 49) representing the internal characteristics of the geographical objects. Genre etc.) or / and external information representing external features (geographic distance in step SX34 in FIG. 53, street in step SX110 in FIG. 66, etc.), including the name, telephone number, address, Postal code, field, brand, item, price, achievement, performance, business hours, floors, nearest street or nearest station.
[0013]
In one embodiment of the navigation device described below, in addition to the above features, almost all the search intermediate results or final search results are displayed on the display map (step SX92 in FIG. 65, step SX122 in FIG. 66, step in FIG. 67). SX146 etc.), the display scale of each of the divided screens is determined.
[0014]
In one embodiment of the navigation device described below, in addition to the above features, the divided screens have been combined so far, and the division of the screen (step SX10 in FIG. 49, etc.) Input of search conditions, output of the above search results, switching operation of the operator, change in driving state at the current position, change in vehicle speed at the current position, change in direction of the current position, distance from the intersection or turn point to the current position This divided screen is executed in response to a change or / and a change in the distance to the destination or stopover. , Change in vehicle speed at current position, change in direction of current position, change in distance from intersection or turn point to current position or / and change in distance to destination or stopover It is combined (step SX30 of FIG. 49) in accordance with, the screen after coalescence, wherein the map information including have information or the current location is displayed before the screen split is displayed.
[0015]
In one embodiment of the navigation device described below, in addition to the above features, the search condition includes a condition for designating an area by all or part of an identification number for identifying the area (step SX62 in FIG. 64), A condition for designating / extracting a street (step SX116 in FIG. 66), a condition for extracting a geographical object in the vicinity of the street based on a distance from the street, a genre, a business content, and / or a price of a handled product / service The condition for extracting a target object (step SX138 in FIG. 67), the condition for extracting a geographical object by business hours or business items (step SX22 in FIG. 49), and the number of floors of the building / facility where the geographical object exists Depending on the conditions for extracting the target, the current position, the vehicle or the distance from the guide route, Is a combination of at least one of the following conditions (step SX34 in FIG. 53) and conditions (step SX36 in FIG. 53) for extracting a geographical object according to the current position, the vehicle or the relative position direction from the guide route. Yes, according to a switching command or a predetermined condition (steps SX6, SX16, SX18, SX24, SX26 in FIG. 49, steps SX74, SX78, SX82, SX86 in FIG. 64), and a combination of these is switched. .
[0016]
One embodiment of a medium storing a computer program for navigation processing described below retrieves a geographic object from a number of stored geographic object locations and information representing the geographical object. (Steps SX8 and SX22 in FIG. 49, Steps SX76, SX80 and SX84 in FIG. 64). At this search, at least one search condition is set, and the search result of the search is output. The display screen is divided into two or more screens (step SX10 in FIG. 49), and different information of the search condition and / or search result is displayed on each of the divided display screens (in FIG. 49). Step SX4, SX12, SX14, SX20, SX22, Step SX62, SX64 in FIG. 64, Step SX in FIG. 4, the steps of FIG. 66 SX122, SX123, the steps of FIG. 67 SX132, SX140, SX141, SX146, SX147) that a Japanese Christian a.
[0017]
2. Overall circuit
FIG. 1 shows an entire circuit of a navigation apparatus according to the present invention. The central processing unit 1 controls the operation of the entire navigation device. The central processing unit 1 includes a CPU (Central Processing Unit) 2, a flash memory 3, a ROM 4, a RAM (Random Access Memory) 5, a sensor input interface 7, a communication interface 8, an image processor 9, an image memory 10, an audio processor 11, and The timepiece 14 is configured. The CPUs 2 to 14 are connected to each other by a CPU local bus 15. Under the control of the CPU 2, various information data is exchanged between devices such as the flash memory 3.
[0018]
The flash memory 3 includes a memory (EEPROM) that can be electrically erased and written. In the flash memory 3 (internal storage medium / means), the computer program 38b stored in the information storage section 37 (external storage medium / means) is copied and stored (installed / transferred). In the flash memory 3, a program 38b transmitted from the external device via the data transmitting / receiving device 27 is copied and stored. The program 38b is a program corresponding to each flowchart described later, and a program for various processes executed by the CPU 2. For example, the program 38b includes information display control and voice guidance control.
[0019]
This installation (transfer / copy) is automatically executed when the information storage unit 37 is set in the navigation device, is automatically executed when the navigation device is turned on, or is executed by an operator's operation. Is done. This information storage unit 37 can be replaced with another information storage unit 37, whereby the program and data are replaced with newer or newer ones. As a result, the latest navigation system is supplied by this exchange.
[0020]
The information stored in the flash memory 3 includes various parameters used for navigation operations. The ROM 4 stores display graphic data and various general-purpose data. The display graphic data is each data necessary for route guidance and map display displayed on the display 33. The various general-purpose data are each data used at the time of navigation, such as voice waveform data obtained by synthesizing a guidance voice or recording a real voice.
[0021]
The RAM 5 stores data input from the outside, various parameters used for calculation, calculation results, a navigation program, and the like. That is, the RAM 5 is also used as a cache memory. The timepiece 14 includes a counter and a battery backup RAM or EEPROM. Time information is output from the clock 14.
[0022]
The sensor input interface 7 includes an A / D conversion circuit or a buffer circuit. Each sensor of the current position detection device 20 is connected to the sensor input interface 7. Sensor data of an analog signal or a digital signal is input to the sensor input interface 7 from each sensor of the current position detection device 20. The sensors of the current position detection device 20 include an absolute direction sensor 21, a relative direction sensor 22, a distance sensor 23, and a vehicle speed sensor 24.
[0023]
The absolute direction sensor 21 is a geomagnetic sensor, for example, and detects geomagnetism. The absolute azimuth sensor 21 outputs data indicating the north-south direction as an absolute azimuth. The relative orientation sensor 22 is a steering angle sensor using a gyro device such as an optical fiber gyroscope or a piezoelectric vibration gyroscope, for example. The steering angle of the wheel is detected by this steering angle sensor. Then, a relative angle in the traveling direction of the host vehicle with respect to the absolute direction detected by the absolute direction sensor 21 is output from the relative direction sensor 22.
[0024]
The distance sensor 23 is composed of, for example, a counter linked to a travel distance meter. The distance sensor 23 outputs data indicating the travel distance of the host vehicle. The speed sensor 24 is composed of a counter or the like connected to a speed meter. The speed sensor 24 outputs data proportional to the traveling speed of the host vehicle.
[0025]
An I / O data bus 28 is connected to the communication interface 8 of the central processing unit 1. The I / O data bus 28 is connected to a GPS receiver 25, a beacon receiver 26, and a data transmitter / receiver 27 of the current position detector 20. Further, the I / O data bus 28 is connected to a touch switch 34, a printer 35, and an information storage unit 37 of the input / output device 30. That is, the communication interface 8 exchanges various data between each accessory device and the CPU local bus 15.
[0026]
As described above, the current position detection device 20 outputs data for detecting the current position of the host vehicle. That is, the absolute azimuth sensor 21 detects the absolute azimuth. The relative azimuth sensor 22 detects the relative azimuth relative to the absolute azimuth. Further, the travel distance is detected by the distance sensor 23. The traveling speed of the host vehicle is detected by the speed sensor 24. The GPS receiver 25 receives GPS (Global Positioning System) signals (microwaves from a plurality of earth-orbiting satellites) and detects geographical position data such as latitude and longitude of the vehicle.
[0027]
Similarly, the beacon receiver 26 receives a beacon wave from an information providing system such as a VICS (Road Traffic Information Communication System). Then, neighboring road information data or GPS correction data is output from the beacon receiving device 26 to the I / O data bus 28.
[0028]
In the data transmitter / receiver 27, the current position information or a road in the vicinity of the own vehicle is exchanged with an interactive current position information providing system or ATIS (traffic information service) using cellular phone, FM multiplex signal or telephone line. Information about the situation is sent and received. These pieces of information are used as position detection information or operation assistance information of the host vehicle. Note that the beacon receiving device 26 and the data transmitting / receiving device 27 may be omitted. As this data transmitting / receiving device 27, a radio receiver, a television receiver, a mobile phone, a pager or other wireless communication device is used.
[0029]
The input / output device 30 includes a display 33, a transparent touch panel 34, a printer 35, and a speaker 13. Guide information is displayed on the display 33 during the navigation operation. The touch panel 34 is attached on the screen of the display 33, and a plurality of transparent touch switches (there are contact switches made of transparent electrodes or piezoelectric switches) are arranged in a planar matrix. From the touch panel 34, information necessary for destination setting such as a departure point, a destination, and a passing point is selected and input to the navigation device.
[0030]
The printer 35 prints various information such as maps and facility guides that are output via the communication interface 8. Each information is transmitted from the speaker 13 to the user by voice. The printer 35 may not be provided.
[0031]
In addition, as the display 33, a display capable of displaying image information such as a CRT, a liquid crystal display, or a plasma display is used. However, a liquid crystal display with low power consumption, high visibility, and light weight is preferable as the display 33. In the present embodiment, a wide liquid crystal display having a wider screen is used as the display 33.
[0032]
The display 33 may be composed of two or more liquid crystal displays that can be separated. Each liquid crystal display is connected to the image processor 9 by an independent video signal cable. Moreover, the liquid crystal displays may be installed at different positions.
[0033]
An image memory 10 such as a DRAM (Dynamic RAM) or a dual port DRAM is connected to the image processor 9 connected to the display 33. The image processor 9 controls the writing of image data to the image memory 10. Further, under the control of the image processor 9, data is read from the image memory 10 and an image is displayed on the display 33.
[0034]
According to the division of the display 33, the image memory 10 is also divided for the second screen and the third surface. According to this division form, the addressing of each image memory element of the image memory 10 is also divided into the second screen and the third screen.
[0035]
The image processor 9 converts map data and character data into display image data according to a drawing command from the CPU 2, and writes it into the image memory 10. At this time, an image around the screen displayed on the display 33 is also formed for scrolling the screen, and is simultaneously written in the image memory 10.
[0036]
Further, when the display screen of the display 33 is divided, the memory area of the image memory 10 is also divided so as to match the screen division. Then, independent image data is written in each divided memory area of the image memory 10.
[0037]
An audio processor 11 is connected to the speaker 13. The audio processor 11 is connected to the CPU 2 and the ROM 4 via the CPU local bus 15. Then, the voice waveform data for the guidance voice read from the ROM 4 is input to the voice processor 11 by the CPU 2. The voice waveform data is converted into an analog signal by the voice processor 11 and output from the speaker 13. The audio processor 11 and the image processor 9 may be constituted by a general-purpose DSP (digital signal processor) or the like.
[0038]
An information storage unit 37 is connected to the I / O data bus 28 via a data transmission / reception unit 39. The information storage unit 37 stores disk management information 38a, a program 38b for controlling each navigation operation described above, and data 38c such as map information. In the disk management information 38a, information related to data and programs stored in the information storage unit 37 is stored. For example, the version information of the program 38b. In the data 38c, data necessary for a navigation operation such as road map data is recorded in a nonvolatile manner. The information storage unit 37 is provided with a data transmission / reception unit 39 that performs data read control with the I / O data bus 28.
[0039]
Further, as the information storage unit 37 of the present invention, not only an optical memory such as a CD-ROM but also the following device may be used. For example, the recording medium may be a semiconductor memory such as an IC memory or an IC memory card, or a magnetic memory such as a magneto-optical disk or a hard disk. Note that, when the recording medium of the information recording unit 37 is changed, the data transmission / reception unit 39 includes a data pickup suitable for the changed recording medium. For example, if the recording medium is a hard disk, the data transmission / reception unit 39 includes a magnetic signal writing / reading device such as a core head.
[0040]
The data 38c in the information storage unit 37 includes map data, intersection data, node data, road data, photograph data, destination point data, guidance point data, detailed destination data, destination reading data, house shape necessary for navigation operations. Data and other data. Further, the navigation operation is executed by using the road map data of the data 38c by the program 38b stored in the information storage unit 37. The navigation program is read from the information storage unit 37 by the data transmission / reception unit 39 and written in the flash memory 3. Other data includes display guidance data, voice guidance data, simplified guidance route image data, and the like.
[0041]
The data 38c of the information storage unit 37 stores map data with different scale ratios and map data with one scale ratio. That is, a map of the same area and a different scale ratio is recorded in the data 38c. Alternatively, map data of one scale ratio is recorded in the data 38c. When map data of one scale ratio is recorded, the map is displayed with the largest scale ratio.
[0042]
In the case where only one map data is recorded in the data 38c, when a small scale map, that is, a map (wide area map) displaying a wide geographical area is displayed on the display 33, the data is recorded in the data 38c. Information is thinned out and displayed from the map data. In the thinning-out display of the map data of the data 38c, not only the geographical distance of each road and the like is reduced, but also the display symbol information of the facility etc. is thinned out.
[0043]
3. Data file of data 38c in information storage unit 37
FIG. 2 shows the contents of each data file stored in the data 38 c of the information storage unit 37. The map data file F1 stores map data such as a national road map, a local road map, or a house map. In the road map, main roads, highways, narrow streets, and other roads and ground targets (facility, etc.) are displayed. A house map is a city map in which a figure representing an outer shape of a ground building, a road name, and the like are displayed. A narrow street is a road that is not used in the route search process of FIG. 5 described later. For example, narrow roads whose road width is a predetermined value or less, and city roads and private roads other than national roads or prefectural roads are narrow streets.
[0044]
The intersection data file F2 stores data related to intersections such as the geographical position coordinates and names of the intersections. The node data file F3 stores geographic coordinate data of each node used for route search on the map. The road data file F4 stores road-related data such as the position and type of roads, the number of lanes, and the connection relationship between the roads. The photograph data file F5 stores image data of photographs showing places where visual display is required such as various facilities, sightseeing spots, or major intersections.
[0045]
The destination data file F6 stores data such as locations and names of places and facilities that are likely to be destinations such as major tourist spots, buildings, and companies / businesses listed in the telephone directory. Yes. The guidance point data file F7 stores guidance data of points that require guidance such as the contents of guidance display boards installed on the road and guidance of branch points. The detailed destination data file F8 stores detailed data relating to the destination stored in the destination data file F6. The road name data file F10 stores name data of main roads among the roads stored in the road data file F4. The branch point name data file F11 stores name data of main branch points. The address data file F11 stores list data for searching the destination stored in the destination data file F6 from the address.
[0046]
The area / city code list file F12 stores list data of only the area / city code of the destination stored in the destination data file F6. The registered telephone number file F13 stores telephone number data to be remembered such as business partners registered by the user's manual operation. In the mark data file F14, data such as the position and name of a place to be remembered and a place to be remembered, which are input by a user through a manual operation, are stored. The point data file F15 stores detailed data of the mark points stored in the mark data file F14. In the facility data file F16, data such as the position and description of a target such as a place where a person wants to drop in other than a destination such as a gas station, a convenience store, or a parking lot is stored.
[0047]
4). Data contents of RAM5
FIG. 3 shows a part of the data group stored in the RAM 5. The current position data MP is data representing the current position of the host vehicle detected by the current position detection device 20. The absolute azimuth data ZD is data indicating the north-south direction, and is obtained based on information from the absolute azimuth sensor 21. The relative azimuth angle data Dθ is angle data formed by the traveling direction of the host vehicle with respect to the absolute azimuth data ZD. The relative azimuth angle data Dθ is obtained based on information from the relative azimuth sensor 22.
[0048]
The travel distance data ML is the travel distance of the host vehicle and is obtained based on the data from the distance sensor 23. The current position information PI is data relating to the current position, and is input from the beacon receiving device 26 or the data transmitting / receiving device 27. The VICS data VD and ATIS data AD are data input from the beacon receiving device 26 or the data transmitting / receiving device 27. Using this VICS data VD, error correction of the vehicle position detected by the GPS receiver 25 is executed. In addition, regional traffic regulations and traffic congestion are determined by the ATIS data AD.
[0049]
The registered destination data TP is data related to the destination such as the coordinate position and name of the destination registered by the user. In the guidance start point data SP, map coordinate data of a point where the navigation operation is started is stored. Similarly, the map information of the point where the navigation operation is ended is stored in the final guidance point data ED.
[0050]
Note that the node coordinates on the guide road closest to the current location or the departure location of the host vehicle are used as the guidance start point data SP. The reason why the guidance start point data SP is stored is that the current location of the vehicle according to the current position data MP is, for example, in a site such as a golf course or a parking lot, and is not necessarily on the guide road. . Similarly, the node coordinates on the guide road closest to the registered destination data TP are also stored in the guidance final point data ED. The reason why this guidance final point data ED is stored is that the coordinates of the registered destination data TP may not be on the guidance road.
[0051]
The guide route data MW stored in the RAM 5 is data indicating an optimum route to the destination or a recommended route, and is obtained by route search processing or re-search processing in step SA4 described later. Each road in the road map stored in the data 38c of the information storage unit 37 is given a unique road number. The guide route data MW is composed of a row of road numbers from the guide start point data SP to the final guide point data ED.
[0052]
The mode set data MD is data used in destination setting processing described later. This mode set data MD is set by a touch switch 34 laminated on the display 33. The mode contents displayed on the display 33 are specified by the mode set data MD. The stop-in place DP is information relating to a facility or the like that stops along the guide route.
[0053]
The screen state GJ is data indicating the display state of the display 33. That is, the display screen of the display 33 is divided by processing of a program described later. The data of the screen state GJ indicates whether the display screen of the display 33 is a divided state or a single screen state. Therefore, each time the display state of the display 33 is switched, the data of the screen state GJ is rewritten.
[0054]
The cross point CSP is data used in a route forward display process described later. Specifically, although the screen of the display 33 is divided and displayed, the geographical coordinates of the end points in the guide route displayed on one side of the divided screen are represented. Starting from this cross point CSP, a guide route is displayed on the other divided screen.
[0055]
The scale WDA of the first screen represents the scale of the map displayed on the single screen before division of the display 33. The scale WDB of the second screen is a screen after division of the display 33 and represents the scale of the map displayed on the screen closer to the auxiliary seat. Therefore, the second screen is a screen on the passenger seat side of the split screen for convenience. Similarly, the scale WDC on the third screen represents the scale of the map displayed on the screen close to the driver after the division. That is, the third screen is a screen on the driver side of the split screen. In the present invention, the second screen may be a driver-side screen of the divided screens, and the third screen may be a passenger-side screen.
[0056]
The horizontal distance XLM represents a geographical linear distance that can be displayed in the horizontal direction of the screen in a map displayed on the screen of the display 33 according to a specified scale. Similarly, the vertical distance YLM represents a geographical linear distance that can be displayed in the vertical direction of the screen in a map displayed on the screen of the display 33 according to a specified scale.
[0057]
The point node NDP is data used in a program “displayable range calculation process” described later. Specifically, it is the coordinate value of the node displayed at the screen edge of the guide route displayed on the divided screen. Details will be described later.
[0058]
5). Road data
FIG. 4 shows a part of the road data in the road data file F4 stored in the information storage unit 37. This road data file F4 includes information on roads having a certain width or more existing in the area stored in the map data file. If the number of roads included in the road data file F4 is n, road data relating to n roads is included. Each road data includes road number data, guidance target flags, road attribute data, shape data, guidance data, and length data.
[0059]
The national roads and the like included in the map data in the information storage unit 37 are divided into minimum units. The identification number assigned to each divided road is road number data. In the guidance target flag of the road data file F4, “1” is stored for the guidance target road, and “0” is stored for the non-guidance target road. The guidance target road is a road having a predetermined width or more, for example, a width of 5.5 meters or more, such as a main road or a general road that is equal to or higher than a prefectural road, and is a road to be searched for a route. The non-guide target road is a narrow narrow street having a predetermined width or less, for example, a width of less than 5.5 meters, such as an alley or an alley, and is a road that is not a target for route search. Further, the guidance target road may be set as a trunk road above the prefectural road, and the non-guidance target road may be set as a main road below the prefectural road.
[0060]
The road attribute data is data indicating attributes of an elevated road, an underpass, an expressway, a toll road, and the like. The shape data is data indicating the shape of the road. For example, the shape data is composed of the coordinate data of the start point and end point of the road and the coordinate data of each node between the start point and the end point.
[0061]
The guidance data includes intersection name data, attention point data, road name data, road name voice data, and destination data. The intersection name data is data representing the name of the intersection when the end point of the road is an intersection. The caution point data is data relating to caution points on the road such as railroad crossings, tunnel entrances, tunnel exits, and width reduction points. The road name voice data is voice data representing a road name used for voice guidance.
[0062]
The destination data is data relating to a road (this is a destination) connected to the end point of the road, and is composed of the number of destinations k and data for each destination. The data related to the destination includes destination road number data, destination name data, destination name voice data, destination direction data, and travel guidance data.
[0063]
The destination road number data indicates the destination road number. The name of the destination road is indicated by the destination name data. In the destination name voice data, voice data for voice guidance of the destination name is stored. The direction of the destination road is indicated by the destination direction data. The travel guidance data is guidance data for guiding the user to stop on the right lane, stop on the left lane, or travel in the center in order to enter the destination road. The length data is data of the length from the start point to the end point of the road, the length from the start point to each node, and the length between the nodes.
[0064]
6). Overall processing
FIG. 5 shows a flowchart of the entire process executed by the CPU 2 of the navigation device according to the present invention. This process starts when the power is turned on and ends when the power is turned off. The turning on and off of the power is performed by turning on / off the power of the navigation apparatus or turning on / off the engine start key (ignition switch) of the vehicle.
[0065]
The initialization process in step SA1 in FIG. 5 is as follows. First, the navigation program is read from the information storage unit 37. The read navigation program is copied to the flash memory 3. Thereafter, the program of the flash memory 3 is executed. Further, the CPU 2 clears the general-purpose data storage area in each RAM such as the work memory of the RAM 5 and the image memory 10.
[0066]
The copying of the program to the flash memory 3 is executed when a new program 38b is set in the navigation device by exchanging the information storage unit 37. That is, only when the new information storage unit 37 is set in the navigation device for the first time, copying of the program to the flash memory 3 is executed.
[0067]
Then, the current position process (step SA2), the destination setting process (step SA3), the route search process (step SA4), the guidance / display process (step SA5), and other processes (step SA6) are cyclically executed. . Note that the destination setting process (step SA3) and the route search process (step SA4) are not performed in a duplicated manner when there is no change in destination or departure of the host vehicle from the route.
[0068]
In the current position process (step SA2), the geographical coordinates (latitude, longitude, and altitude) of the host vehicle that is the ground moving body on which the navigation device is loaded are detected. That is, the GPS receiver 25 receives radio waves from a plurality of satellites orbiting the earth. The radio wave from each satellite detects the coordinate position of each satellite, the radio wave transmission time in the satellite, and the radio wave reception time in the GPS receiver 25. From these pieces of information, the distance to each satellite is obtained by calculation. From the distance to each satellite, the coordinate position of the vehicle on the earth surface is obtained. The obtained coordinate position of the host vehicle is stored in the RAM 5 as current position data MP. The current position data MP may be modified by information input from the beacon receiving device 26 or the data receiving device 27.
[0069]
In the current position processing (step SA2), the absolute azimuth data ZD, the relative azimuth angle data Dθ, and the travel distance data ML are obtained using the absolute azimuth sensor 21, the relative azimuth sensor 22, and the distance sensor 23. It is done. From the absolute azimuth data ZD, the relative azimuth angle data Dθ, and the travel distance data ML, a calculation process for specifying the vehicle position is performed. The own vehicle position obtained by this calculation process is compared with the map data stored in the data 38c of the information storage unit 37, and correction is performed so that the current position on the map screen is accurately displayed. With this correction process, the current position of the host vehicle can be accurately obtained even when GPS signals in the tunnel or the like cannot be received.
[0070]
In the destination setting process (step SA3), the geographical coordinates of the destination desired by the user are set as registered destination data TP. For example, the coordinates of the destination are designated by the user using a road map or a house map displayed on the display 33. Alternatively, the destination is specified by the user from the item-specific list of destinations displayed on the display 33. When this destination designation operation is performed by the user, information data such as geographic coordinates of the destination is stored in the RAM 5 as registered destination data TP.
[0071]
In the route search process (step SA4), an optimum route from the guidance start point data SP to the final guidance point data ED is searched. The optimal route here is, for example, a route that can reach the destination in the shortest time or the shortest distance, or a route that preferentially uses a wider road. Or when using an expressway, it is the route etc. which can reach the destination in the shortest time or the shortest distance using the expressway.
[0072]
In the guidance start point data SP, the same data as the current position data MP is set, or node data of a guidance target road close to the current position data MP is set. There is an auto reroute mode in which when the current travel position of the host vehicle deviates from the guide route, an optimum route from the deviated current position to the final guide point is automatically re-searched. If the auto reroute mode is not set, route search is not performed. In addition, when a stop-by place is set as the guide route, a route passing through the stop-off place may be searched.
[0073]
In the guidance / display process (step SA5), the guidance route obtained in the route search process (step SA4) is displayed on the display 33 with the current position of the host vehicle as the center. The guide route displayed on the display 33 is displayed so as to be identifiable on the display map. For example, only the guidance route is displayed in different colors on the map displayed on the display 33. Furthermore, road guidance information is pronounced from the speaker 13 so that the host vehicle can travel well according to this guidance route. Similarly, various types of guidance information are displayed on the display 33 as needed. The image data for displaying the guidance route is road map data around the current position in the data 38c in the information storage unit 37 or housing map data around the current position.
[0074]
Switching between the road map data and the house map data is performed under the following conditions. For example, it is switched by the distance from the current position to a guide point (destination, stopover, intersection, etc.), the speed of the host vehicle, the size of the displayable area, or an operator's switch operation. Further, an enlarged map near the guidance point is displayed on the display 33 in the vicinity of the guidance point (destination, stopover, intersection, etc.). Note that a simplified guide route image may be displayed on the display 33 instead of the road map. In this simplified guidance route image, for example, the display of geographical information is omitted, and only necessary minimum information such as the guidance route and the destination or the direction of the stop-by place and the current position is displayed.
[0075]
Further, the screen of the display 33 on which information such as a map is displayed is divided into two in response to the operation of the operator, as will be described later. The two screens display various guidance information and road information by independent operations.
[0076]
After the guidance / display processing in step SA5, other processing (step SA6) is executed. In “other processing” of step SA6, the nearest facility processing may be executed. The nearest facility process is a process in which a stopover place (facility, etc.) other than the registered destination data TP is searched and designated. The data regarding this stop-in place is determined using a map displayed on the display 33 or each item information. This nearest facility process is performed in the same manner as the destination setting process in step SA3.
[0077]
Furthermore, in other processing, for example, it is determined whether or not the traveling position of the host vehicle is along the calculated guide route. Further, it is also determined whether or not a destination change command is input by an operator's switch operation. When the process of step SA6 ends, the process is repeated again from the current position process (step SA2). Even when the host vehicle reaches the destination, the route guidance / display processing is terminated, and the processing is returned to step SA2. In this way, the processing from step SA2 to step SA6 is sequentially repeated.
[0078]
7). Guide / display processing of the first embodiment
The guidance / display processing is information notification processing for causing the host vehicle to travel along the guidance route. That is, a guide route is searched by step SA4. The searched guide route is displayed on the display 33. Moreover, the displayed guidance route is always displayed so that the host vehicle is at the center of the screen. In addition, information on a point to turn right or left in the guidance route is notified as needed. In this way, a process in which various types of information are notified or displayed at any time so that the host vehicle can travel well along the guidance route is a guidance / display process.
[0079]
FIG. 6 is a flowchart of the guidance / display process performed in the present embodiment. First, it is determined whether or not the display screen of the display 33 is in a divided state (step SB2). For example, when the display screen of the display 33 is long in the horizontal direction, the display screen is divided into two screens on the left and right with the center of the screen as a boundary. A unique map is displayed for each divided screen. In this embodiment, the passenger seat side screen of the split screen of the display 33 is defined as the second screen, and the driver seat side screen is defined as the third screen. Therefore, in the right-hand drive specification car, the screen on the left side facing the display 33 is the second screen. Conversely, in a left-hand drive vehicle, the screen on the right side of the display 33 is the second screen.
[0080]
If the screen is determined to be in the split state by the process in step SB2, it is determined whether or not a screen split release request has been input (step SB4). This release request command is input by pressing a specific switch of the touch switch 34. Instead of the touch switch 34, a push switch or the like provided at the lower part of the screen of the display 33 may be used.
[0081]
If there is a screen division release request, the subroutine “single screen display process” is executed (step SB6). In this single screen processing, a map is displayed on the entire screen of the display 33 based on the scale ratio of the first screen before division. This “single screen display process” will be described in detail later. When the single screen display process is completed, the “other guidance / display process” of the subroutine is executed (step SB8). In step SB8, each piece of information related to the guide route on which the host vehicle travels is displayed or notified as needed.
[0082]
When the “other guidance / display process” is completed, the process returns to the “overall process” flow of FIG. On the other hand, if there is no screen division release request in step SB4, the subroutine “third screen display process” is executed (step SB14). This “third screen display process” will be described later.
[0083]
If it is determined in step SB2 that the display screen of the display 33 is not in the split state, it is determined whether a screen split request has been input (step SB10). This screen division request is also input when a specific switch set in the touch switch 34 is pressed.
[0084]
If there is no screen division request, “other guidance / display processing” in step SB8 is executed. However, if there is a screen division request, a subroutine “screen division process” is executed (step SB12). In this “screen division process”, the display screen of the display 33 is divided and displayed on two screens with the screen center as a boundary. Then, an independent map or guidance information is displayed on each divided screen. This “screen division process” will be described in detail later.
[0085]
When the “screen division process” in step SB12 is executed, the subroutine “third screen display process” is further executed (step SB14). In the “third screen display process”, a process of switching information displayed on the third screen according to the traveling state of the host vehicle is performed. This “third screen display process” will be described later.
[0086]
When the “third screen display process” in step SB14 is completed, it is determined whether or not the route forward display mode has been selected by the operator (step SB16). If the route forward display mode is selected, the “route forward display process” of the subroutine is executed (step SB18). In this “route forward display process”, a process of displaying on the second screen the guide route connected to the upper end (cross point CSP) of the guide route displayed on the third screen is executed. This “route forward display process” will be described in detail later.
[0087]
When the “route forward display process” in step SB18 is completed, the “other guidance / display process” in step SB8 is executed. Then, the process is returned to the “overall process” flow of FIG.
[0088]
On the other hand, if it is determined in step SB16 that the route forward display mode is not selected, it is determined whether or not the all route display mode is selected (step SB20). The selection of the all-route display mode is input by pressing a specific switch set in the touch switch 34. When the all route display mode is selected, the “all route (front) display process” of the subroutine is executed (step SB22). If the all route display mode is not selected, “other guidance / display processing” in step SB8 is executed.
[0089]
In the “all route (front) display process”, a process of connecting to the upper end of the guide route displayed on the third screen and displaying the guide route to the destination on the second screen is executed. The subroutine “all route (front) display process” will be described in detail later. After this all route (front) display processing, “other guidance / display processing” in step SB8 is executed. Thereafter, the process returns to the “overall process” flow of FIG.
[0090]
8). Single screen display processing
FIG. 7 is a diagram showing a subroutine of “single screen processing”. In this single screen process, a process of returning the divided screen of the display 33 to a single screen is executed. First, the screen state GJ of the RAM 5 is read (step SH2). This screen state GJ represents the display mode of the map displayed on the third screen in the divided state.
[0091]
For example, when a map including a narrow street is displayed on the third screen in the divided state, information indicating the display mode is stored in the RAM 5 as the screen state GJ. Based on the screen state GJ, a map is displayed on the screen from which the division is canceled. Therefore, when a map including a narrow street is displayed on the third screen at the time of division, a map including the narrow street is displayed on the first screen after the division is canceled. The first screen means the entire screen of the display 33 that is not divided.
[0092]
Therefore, based on the read screen state GJ, it is determined whether or not a narrow street is included in the map displayed on the third screen (step SH4). If the narrow street is included, the “third screen scale WDC” in the RAM 5 is read (step SH6). Then, the map is based on the screen state GJ, and the map of the scale WDC is displayed on the entire screen of the display 33 (step SH8). That is, a map including a narrow street is displayed on the first screen after division cancellation.
[0093]
On the other hand, when the map including the narrow street is not displayed on the third screen, the “scale WDA of the first screen” in the RAM 5 is read (step SH10). Then, the map is based on the screen state GJ, and the map of the scale WDA is displayed on the entire screen of the display 33 (step SH12). When a simplified diagram is displayed on the third screen at the time of division, the display mode is stored in the screen state GJ. Therefore, this simplified diagram is displayed on the first screen after the division is canceled.
[0094]
When the screen division of the display 33 is canceled in step SH8 or step SH12, the flow returns to the guidance / display processing of FIG.
[0095]
9. Split screen processing
FIG. 8 shows a flowchart of the subroutine “screen division process” of FIG. In this screen division process, the entire screen of the display 33 is divided to form a second screen and a third screen. This screen division is performed as follows. The image data displayed on the display 33 is written in the image memory 10. Therefore, the memory area of the image memory 10 is divided corresponding to the divided screen. Different map information is written into each memory area of the divided image memory 10 by the image processor 9. Thereby, the display screen of the display 33 is divided into two. Moreover, different map information is displayed on each screen.
[0096]
Note that the screen division position is not particularly limited in the present invention, but in the present embodiment, it is approximately the center of the screen of the display 33.
[0097]
At the beginning of the screen splitting process, the display mode of the first screen, that is, the screen before splitting is detected (step SC2). It is determined whether or not a road map including a narrow street is displayed on the first screen based on the detected display mode (step SC4). If a map including a narrow street is displayed on the first screen, a road map excluding the narrow street is displayed on the second screen (passenger seat side screen) after the screen division (step SC6). And the road map of the same display mode as the 1st screen is displayed on the 3rd screen (driver's seat side screen) after a screen division (Step SC8). Here, a road map including narrow streets is displayed on the third screen.
[0098]
On the other hand, if a road map that does not include narrow streets is displayed on the first screen before screen division, a road map that includes narrow streets is displayed on the second screen (passenger seat side screen) (step SC18). Then, a road map not including the narrow street is displayed on the third screen (step SC20).
[0099]
Thus, the map of the aspect different from the screen before a division | segmentation is displayed on the 2nd screen of the divided | segmented screen. And the map of the same aspect as the screen before a division | segmentation is displayed on the 3rd screen of the divided | segmented screen.
[0100]
Thereafter, the display mode of the road map displayed on the third screen is stored as the screen state GJ in the RAM 5 (step SC10). With this road map display mode, if a road map including a narrow street is displayed on the third screen, data representing the mode is set in the screen state GJ. The other data set in the screen state GJ includes a simplified diagram display mode or a display mode of a diagram showing only the right / left turn direction.
[0101]
Further, when a road map other than the simplified map is displayed on the third screen, the geographical coordinates of the guide route that is interrupted at the screen edge are detected. The detected geographic coordinate values are stored in the RAM 5 as a cross point CSP (step SC12). The cross point CSP is a point in the guide route that is ahead of the current location of the host vehicle on the guide route and is interrupted on the display map on the third screen.
[0102]
Then, the scale of the first screen before division is stored in the RAM 5 as “scale WDA of the first screen” (step SC14). Further, the data of “scale WDA of the first screen” is copied to the RAM 5 as “scale WDB of the second screen” and “scale WDC of the third screen” (step SC16). This is because the display screen of the display 33 is immediately after the division, and the same scale map is displayed on both the second screen and the third screen. Therefore, if the scales of the second screen and the third screen are changed, the values of the scales WDB and WDC are changed.
[0103]
When the data of the scale WDA is copied to the scales WDB and WDC, the flow is returned to the guidance / display process of FIG.
[0104]
FIG. 9 is a diagram showing a state before the map displayed on the display 33 is divided. That is, the state of the first screen is shown. Symbol 100 indicates the current position of the host vehicle and the traveling direction. On this screen 104, only the main trunk road 102 is displayed. Symbol 130 indicates north of absolute orientation. The numerical value 132 of the symbol 130 represents the scale of the map displayed on the screen 104. In FIG. 9, it can be seen from the numerical value 132 that the scale is 1/400.
[0105]
FIG. 10 is a diagram showing a state in which the display screen 104 of the display 33 shown in FIG. 9 is divided into left and right parts. A symbol 112 in FIG. 10 indicates the current position of the host vehicle and the traveling direction. The main screen 102 and the narrow street 116 are displayed on the second screen 108. Further, only the main trunk road 102 is displayed on the third screen 110. Thus, on the third screen, a road map having the same display mode as that of the first screen before division is displayed.
[0106]
Symbols 134 and 138 in FIG. 10 indicate the north of the absolute direction. A numerical value 136 indicates a reduced scale of the second screen. A numerical value 140 indicates a reduced scale of the third screen. Information represented by the numerical value 136 is stored in the “second screen scale WDB”. Information represented by the numerical value 140 is stored in the “scale WDC of the third screen”.
[0107]
In the screen division process, a map having a display mode different from the third screen is displayed on the second screen, but a map having the same mode as the third screen may be displayed on the second screen.
[0108]
10. Third screen display process
FIG. 11 is a flowchart showing a subroutine of “third screen display processing” in FIG. In the “third screen display process”, a process for changing the scale of the road map displayed on the third screen is executed.
[0109]
First, it is determined whether or not the distance between the current position of the host vehicle and the next turning point on the guidance route is within a predetermined value (step SD2). That is, it is determined whether or not the traveling vehicle has approached the next right / left turn point on the guide route. If the distance between the host vehicle and the next right / left turn point is within a predetermined value, a simplified diagram showing the right / left turn direction with respect to the straight traveling direction of the host vehicle is displayed on the third screen (step SD4).
[0110]
When a simplified diagram showing the right / left turn direction is displayed on the third screen, data indicating the map display mode of the third screen is stored in the RAM 5 as the screen state GJ (step SD22). Thereafter, the processing returns to the flowchart of FIG.
[0111]
If the distance between the host vehicle and the next turning point is not within a predetermined value, it is determined whether or not there is a request for changing the scale of the map displayed on the third screen (step SD6). When there is a scale change request, a map of the changed scale ratio is displayed on the third screen. Further, the changed scale is stored in the RAM 5 as “scale WDC of the third screen” (step SD8). Note that the scale is changed by operating a specific switch provided on the touch switch 34. If a road map including narrow streets is displayed on the third screen before the scale change of this map, the road map excluding the narrow streets is displayed on the third screen when the scale map is changed to a scale that cannot sufficiently display the narrow streets. Is displayed.
[0112]
When the process associated with the scale change request is completed in this way, it is next determined whether or not the traveling speed of the host vehicle is equal to or less than a predetermined value (0 Km (stop) or several Km (slow speed)) (step SD10). ). If the vehicle speed is slow or less than a predetermined value, a road map including a narrow street is displayed on the third screen (step SD12). If the vehicle speed is not less than the predetermined value, a road map excluding narrow streets is displayed on the third screen (step SD14).
[0113]
Thereafter, it is determined whether or not the host vehicle has been moved a predetermined distance (step SD16). If it has been moved by the predetermined distance, the subroutine “screen scroll processing” is executed (step SD18). In this screen scroll process, the map is scroll-displayed so that the current position of the host vehicle is at the center of the third screen.
[0114]
After the screen scrolling process is executed (step SD18) or when the host vehicle has not moved a predetermined distance (step SD16), the geographical coordinates at the screen edge of the guide route displayed on the third screen are detected. (Step SD20). That is, the guide route displayed on the third screen is interrupted at the screen edge. Therefore, a point on the guide route that is interrupted at the edge of the screen is detected. The coordinate value of the detected point is stored in the RAM 5 as the cross point CSP.
[0115]
Data representing the map display state of the third screen is stored in the RAM 5 as the screen state GJ (step SD22). Thereafter, the process returns to the guidance / display process of FIG.
[0116]
11. Route forward display processing
FIG. 12 shows a flowchart of a subroutine “route forward display process” in the guidance / display process of FIG. In this route forward display process, the remaining guide route following the guide route displayed on the third screen is displayed on the second screen.
[0117]
First, it is determined whether or not the map displayed on the second screen is in the route forward display mode (step SE2). If it is not the route forward display mode, it is determined whether or not a forward display request has been commanded (step SE12). This forward display request is input by operating a specific switch provided on the touch switch 34.
[0118]
If there is no forward display request (step SE12), this “route forward display process” is terminated, and the process returns to the guidance / display process of FIG. On the other hand, if there is a front display request (step SE12), the subroutine “displayable range calculation process” is executed (step SE8).
[0119]
If it is determined in step SE2 that the second screen is not in the forward display state, it is determined whether or not there is a scale change request (step SE4). If there is no scale change request, the subroutine “displayable range calculation process” is executed (step SE8). Conversely, if there is a scale change request, the data value of “second screen scale WDB” in RAM 5 is changed (step SE6). The scale changing process is also performed by operating a specific switch provided on the touch switch 34.
[0120]
The subroutine “displayable range calculation process” will be described later. The point node NDP is obtained by this displayable range calculation process. Then, the guide route is displayed on the second screen using the point node NDP and the cross point CSP. The point node NDP is a geographic coordinate value of the end point of the guide route that can be displayed by the scale WDB.
[0121]
That is, the guide route from the cross point CSP to the point node NDP is displayed on the map that can be displayed by the reduced scale WDB. This point node NDP is detected by the subroutine “displayable range calculation process”.
[0122]
The second road map including the guide route is such that the middle point of each east longitude coordinate value of the cross point CSP and the point node NDP is substantially located on the center perpendicular line of the second screen, and the cross point CSP is located at the lower end of the screen. It is displayed on the screen (step SE10). When the remaining guide route excluding the guide route displayed on the third screen is displayed on the second screen in this way, the process returns to the guide / display process of FIG.
[0123]
12 Displayable range calculation processing
FIG. 13 is a flowchart of the subroutine “displayable range calculation process” in FIG. First, the geographical range of the map that can be displayed on the second screen by the reduced scale WDB is calculated (step SF2). That is, when the map of the reduced scale WDB is displayed on the second screen, the linear distance in the horizontal direction of the screen displayed on the screen is calculated. The displayable horizontal distance in the horizontal direction of the screen is stored in the RAM 5 as the horizontal distance XLM. Similarly, the linear distance in the screen vertical direction that can be displayed is stored in the RAM 5 as the vertical distance YLM.
[0124]
Next, the process of steps SF6 to SF10 is repeated until the condition of step SF12 is satisfied. These processes are processes for effectively displaying the guide route on the second screen, starting from the cross point CSP of the guide route. That is, when the cross point CSP is used as a base point, the remote point of the guide route that can be displayed by the reduced scale WDB is within a rectangular area constituted by the horizontal distance XLM and the vertical distance YLM.
[0125]
Therefore, it is sequentially investigated whether or not the coordinate value of each node on the guide route is within a rectangle having the cross point CSP as one vertex and surrounded by the horizontal distance XLM and the vertical distance YLM. Therefore, the value of the number-of-times value N of step SF4 indicates the Nth node on the guide route starting from the cross point CSP. Then, based on the number-of-times value N that is incremented every “1”, the processes of steps SF4 to SF22 are repeatedly executed.
[0126]
The numerical value N is initially set to “1” and the interval XN is initially set to “0”. Further, the east longitude coordinate value of the cross point CSP is stored in the horizontal position XP (step SF4). Next, the coordinate value of the Nth node of the guidance route connected to the cross point CSP is read from the road data file F4 and the node data file F3. The read coordinate value of the node is stored in the RAM 5 as the point node NDP (step SF6). The north latitude value of the cross point CSP is subtracted from the north latitude value of the point node NDP. The result of this subtraction is stored in the RAM 5 as the vertical value YM (step SF8).
[0127]
Further, the value of the horizontal position XP is subtracted from the east longitude value of the point node NDP. Then, the absolute value of the subtraction value is stored in the RAM 5 as the horizontal value XM (step SF10). Next, it is determined whether or not the horizontal value XM is larger than the interval XN (step SF12). If the horizontal value XM is larger than the interval XN, the value of the horizontal value XM is substituted for the interval XN (step SF14).
[0128]
On the other hand, when the horizontal value XM is less than or equal to the interval XN, the east longitude value of the (N-1) th node of the guide route is stored in the horizontal position XP (step SF20). Then, the interval XN is cleared to 0 (step SF22). These steps SF12, SF20, and SF22 are performed to detect that the guide route is curved in the east longitude direction.
[0129]
That is, the cross point CSP is displayed at the lower end of the second screen, but when the guide route is curved in the east longitude direction, the guide route including the curved portion must be efficiently displayed on the second screen. Therefore, the point node NDP which is the displayable end of the guide route is sequentially searched using the curved portion of the guide route as a new base point (horizontal position XP).
[0130]
Next, the horizontal value XM and vertical value YM obtained in steps SF8 and SF10 are compared with each horizontal distance XLM and vertical distance YLM as follows.
[0131]
XM> XLM (A)
0>YM> YLM (B)
That is, whether or not the horizontal value XM is larger than the horizontal distance XLM is determined by the equation (A). Whether the vertical value YM is smaller than “0” or larger than the vertical distance YLM is determined by the equation (B).
[0132]
If either expression (A) or (B) is positive, the series of processes of steps SF6 to SF22 is terminated. Then, the process returns to the route forward display process of FIG. However, if both formulas (A) and (B) are incorrect, the count value N is incremented by “1” and the process for the next node in the guide route is executed (step SF18).
[0133]
Through the processing of steps SF6 to SF22 described above, the coordinate values of the end points of the guide route that is a guide route starting from the cross point CSP and efficiently displayed on the second screen are stored in the point node NDP.
[0134]
Note that the guide route displayed on the second screen is set so that the guide route of the cross point CSP portion faces the vertical direction of the screen.
[0135]
FIG. 14 is a diagram illustrating a state where the front portion of the guide route is displayed on the second screen by the route front display process of FIG. 12. The guide route 144 of the second screen is connected to the cross point CSP of the guide route 146 displayed on the third screen 110. When a road map including the guidance route 144 is displayed on the second screen by the reduced scale WDB, a point on the guidance route that can be effectively displayed is the point node NDP. Further, the curved portion 148 in the east longitude direction of the guide route is detected by steps SF12 to SF22 in FIG. That is, the east longitude value newly stored at the horizontal position XP in step SF22 is the coordinate of the bending portion 148.
[0136]
13. All route (front) display processing
FIG. 15 shows a subroutine for the all route (front) display process in FIG. In this all-route (front) display process, the remaining guide route following the cross-point CSP, which is the display interruption point of the guide route displayed on the third screen, and the entire guide route to the destination is displayed on the second screen. Is displayed. Moreover, in this all route (front) display process, the display scale can be changed. That is, a wider range of road map including the remaining guide route can be displayed.
[0137]
First, it is determined whether or not the entire route is displayed on the second screen (step SG2). If all routes are displayed on the second screen, it is determined whether or not a scale change request has been made (step SG4). The scale changing process is executed by a user operating a specific switch provided on the touch switch 34.
[0138]
When the scale change is requested, the value of the scale WDB is changed (step SG6). Then, a map is displayed on the second screen by the changed scale WDB (step SG8). When the scale is reduced and the guide route from the cross point CSP to the destination cannot be displayed on the entire second screen, the same processing as the route forward display processing of FIG. 12 is executed. That is, the display position of the guide route is adjusted so that the guide route is displayed most efficiently on the second screen.
[0139]
If it is determined that there is no request for changing the scale (step SG4), the process in FIG. 15 is terminated, and the process returns to the guidance / display process in FIG. Furthermore, if the display mode of the second screen is not the all route display state (step SG2), it is determined whether or not an all route display request has been input (step SG10). This all route display request is input by operating a specific switch set in the touch switch 34.
[0140]
If there is no all route display request, the processing in FIG. 15 is terminated, and the processing is returned to the guidance / display processing in FIG. On the other hand, when an all route display request is input, the following processing is executed. In the coordinate values of each node in the guidance route from the cross point CSP to the final guidance point data ED, the maximum and minimum values of latitude and longitude are detected (step SG12). A scale that can display the geographical interval between the maximum and minimum values of the latitude and longitude on the second screen is obtained (step SG14). For this scale calculation, a numerical value conversion table obtained in advance may be used.
[0141]
A road map including the guide route is displayed on the second screen at the calculated scale (step SG16). Further, the scale obtained in step SG14 is stored in the RAM 5 as “second screen scale WDB” (step SG18). Thereafter, the scale changing process after step SG4 is executed.
[0142]
FIG. 16 is a diagram showing a state in which the guidance route from the cross point CSP to the destination 152 is displayed on the second screen 108 by this all route (front) display process. In this way, in the entire route (front) display process, the entire guide route ahead of the cross point CSP which is the end of the guide route on the third screen is displayed on the second screen.
[0143]
In the above embodiment, when screen division is instructed, map information that is more important during traveling is displayed on the third screen. Moreover, map information that is relatively insignificant is displayed on the second screen. The important map information means information that is more necessary for the driver during traveling on the guide route. That is, when traveling along the guide route, when the host vehicle approaches an intersection where the vehicle turns right or left, information indicating the direction of turning right or left is more important than information related to the entire guide route. Therefore, information indicating the direction of turning left and right is displayed on the third screen.
[0144]
Then, road information with relatively small importance is displayed on the second screen. Here, a general road map including a guide route is displayed on the second screen. In addition, when the host vehicle is not approaching the right or left turning point, it automatically processes on which screen the map including the narrow street and the map not including the narrow street are displayed. That is, if the vehicle speed is a certain value or more, a road map including a narrow street is not very important for the driver. Therefore, a road map of only the main trunk road is displayed on the third screen, and a road map including a narrow street is displayed on the second screen.
[0145]
In addition, the 3rd screen in the said Example was made into the right side of the display surface of the display 33. FIG. In a right-hand drive vehicle, the third screen is the split screen that is closer to the driver. That is, the third screen is a divided screen closer to the driver. Therefore, in the left-hand drive car, the split screen on the left side of the display 33 is the third screen.
[0146]
That is, when split screen display is selected, more important guidance information is preferentially displayed on a screen closer to the driver. Then, auxiliary guidance route information is displayed on the passenger seat screen. In the above embodiment, a heading-up map is displayed on the first to third screens, but a north-up map may be displayed. Heading up is a state in which a map is displayed so that the traveling direction of the host vehicle is always on the top of the screen. North-up is a state in which the map is displayed so that the north in the absolute direction is always above the screen.
[0147]
FIG. 17 shows a simplified diagram displayed on the screen of the display 33. The screen 104 includes a symbol 120 indicating the absolute direction (north of geomagnetism), a symbol 126 indicating the current position of the host vehicle, an arrow 122 indicating the direction of the destination, and a character information string 124 indicating the distance to the destination. Is displayed. Such a simplified diagram may be displayed on any of the first to third screens.
[0148]
Note that the present invention is not limited to the simplified diagram shown in FIG. For example, the traveling direction of the host vehicle may be displayed so as to be always above the screen 104. In this case, the symbol 120 representing the absolute azimuth is rotated on the screen 104 according to the relative azimuth angle data Dθ.
[0149]
FIG. 18 is a diagram showing a part of the circuit configuration of the image processor 9 inserted between the image memory 10 and the display 33. The circuit of FIG. 18 is also used when the screen of the display 33 is divided as shown in FIG. The output of the image memory 10 is connected in parallel to the palette RAM 204 and the palette RAM 208. That is, the same image data is input to the palette RAM 204 and the palette RAM 208. The output of the palette RAM 204 is connected to the terminal 222 of the digital switch 214. The output of the palette RAM 208 is connected to the terminal 224 of the switch 214. The output of the switch 214 is connected to a digital / analog converter (DAC) 218.
[0150]
The analog video signal output from the DAC 218 is input to the display control circuit of the display 33. Note that the display control circuit of the display 33 generates various control signals for driving the liquid crystal display. A control signal 202 of the image processor 9 is input to the image memory 10. The switching control signal 216 of the digital switch 214 is generated by the image processor 9.
[0151]
Although not shown, other circuits of the image processor 9 are connected to the palette RAMs 204 and 208, and conversion table data is written therein. That is, the conversion table data written in the palette RAM 204 and the conversion table data written in the palette RAM 208 are different. The difference between the conversion table data is data relating to the display color of the narrow street. For example, the conversion table of the palette RAM 204 stores data in which narrow streets are displayed in a color different from the background color of the screen. On the other hand, the conversion table of the palette RAM 208 stores data in which the narrow streets have the same color or approximate color as the screen.
[0152]
The colors of the other map display objects are substantially the same in the conversion table of each palette RAM 204. In such a circuit, digital image data read from the image memory 10 is serial / parallel converted and then input to the address terminals of the palette RAMs 204 and 208. Digital color signals output from the palette RAMs 204 and 208 are input to the switch 214. Switching control of the switch 214 is performed by the image processor 9. This switching is performed at a divided portion of the second screen 108 and the third screen 110. That is, when the image data of the second screen 108 is read from the image memory 10, the switch 214 is switched to the palette RAM 204 side. As a result, the color signal output from the palette RAM 204 is input to the DAC 218.
[0153]
Further, when the image data of the third screen 110 is read from the image memory 10, the switch 214 is switched to the palette RAM 208 side. As described above, data for displaying narrow streets is written in the conversion table of the palette RAM 204. In the conversion table of the palette RAM 208, data that does not display narrow streets is written. As a result, as shown in FIG. 10, the narrow street is displayed on the screen on the second screen 108, and the narrow street is not displayed on the third screen 110.
[0154]
In FIG. 18, only one palette RAM 204, 208 is shown, but these palette RAMs are composed of three palette RAMs of red, green, and blue.
[0155]
14 Guide / display processing of the second embodiment
FIG. 19 is a flowchart of the second embodiment of the guidance / display processing according to the present invention. In the second embodiment, the display screen of the display 33 is divided as in the first embodiment. The north-up screen is displayed on one of the divided screens, and the heading-up screen is displayed on the other screen. On the north-up screen, the map is displayed so that the north of geomagnetism is always at the top of the screen. On the heading-up screen, a map is displayed so that the traveling direction of the host vehicle is always directed upward.
[0156]
The process of FIG. 19 will be described in detail. First, it is determined whether or not the schematic display selection is instructed by the user (step SK2). This simplified diagram display command is input by pressing a specific switch of the touch switch 34.
[0157]
When the simplified diagram display is selected, the simplified diagram is displayed on the entire screen of the display 33 (step SK16). This schematic diagram is the same as the first embodiment and is shown in FIG. If there is no selection of the schematic display (step SK2), it is determined whether or not a split screen display is commanded (step SK4). This split screen display command is also input when a predetermined switch of the touch switch 34 is turned on. If the split screen display is not selected, other guidance / display processing in step SK18 is executed. In step SK18, each piece of information related to the guide route on which the host vehicle travels is displayed or notified as needed. Thereafter, the guidance / display processing subroutine of FIG. 19 is terminated.
[0158]
On the other hand, when the split screen display is selected (step SK4), the display state of the first screen is detected (step SK6). The first screen means a screen before the display 33 is divided. That is, the state of the map displayed on the entire display 33 is detected. The state of the displayed map means the display mode of the map displayed on the display 33. That is, it is determined whether the map is displayed on the display 33 by the north-up screen or the heading-up screen.
[0159]
When the heading-up map is displayed on the first screen, that is, the screen before division of the display 33 (step SK7), the north-up map is displayed on the second screen (step SK8). Further, a heading-up map is displayed on the third screen (step SK10). Thereafter, other guidance / display processing is executed (step SK18). Then, the subroutine of FIG. 19 is terminated. When the subroutine of FIG. 19 is completed, the process returns to the main process of FIG.
[0160]
When the heading-up map is not displayed on the screen before division of the display 33 (step SK7), the heading-up map is displayed on the second screen (step SK12). Further, a north-up map is displayed on the third screen (step SK14). That is, the map displayed before the screen is divided is always displayed on the third screen. Then, a map in a display state that is paired with the third screen is displayed on the second screen. Thereafter, other guidance / display processing is executed (step SK18). Then, the subroutine of FIG. 19 is terminated. When the subroutine of FIG. 19 is completed, the process returns to the main process of FIG.
[0161]
The second screen and the third screen are provided by dividing the screen of the display 33 as in the first embodiment. That is, the divided screen closer to the driver side is the third screen, and the divided screen closer to the passenger seat side is the second screen.
[0162]
FIG. 20 shows a state of a divided screen according to the second embodiment. The first screen, that is, the screen before division of the display 33 is shown in FIG. That is, it is assumed that a heading-up map is displayed before division. In this state, when division of the screen is instructed, a north-up map is displayed on the second screen 108. That is, the symbol 120 indicating the absolute orientation of the second screen 108 faces upward. Moreover, the symbol 100 indicating the traveling direction of the host vehicle is turned sideways.
[0163]
The third screen 110 displays a heading-up map. That is, the symbol 100 indicating the traveling of the host vehicle is directed upward on the screen. The north direction on the third screen 110 is the right-hand direction of the screen as indicated by the symbol 122.
[0164]
15. Guide / display processing of the third embodiment
FIG. 21 is a flowchart of the third embodiment of the guidance / display processing according to the present invention. In the third embodiment, the same processes as those in the second embodiment are denoted by the same reference numerals. In the third embodiment, the display screen of the display 33 is divided. Then, the map displayed before the division is displayed as it is on one of the divided screens. A schematic diagram is displayed on the other screen.
[0165]
The process of FIG. 21 will be described in detail. First, it is determined whether or not the schematic display selection is instructed by the user (step SK2). This simplified diagram display command is input by pressing a specific switch of the touch switch 34.
[0166]
When the simplified diagram display is selected, the simplified diagram is displayed on the entire screen of the display 33 (step SK16). This schematic diagram is the same as the first embodiment and is shown in FIG. If there is no selection of the schematic display (step SK2), it is determined whether or not a split screen display is commanded (step SK4). This split screen display command is also input when a predetermined switch of the touch switch 34 is turned on. If the split screen display is not selected, other guidance / display processing in step SK18 is executed. In step SK18, each piece of information related to the guide route on which the host vehicle travels is displayed or notified as needed. Thereafter, the subroutine of the guidance / display process in FIG. 21 is terminated.
[0167]
On the other hand, when the split screen display is selected (step SK4), the display state of the first screen is detected (step SK6). The first screen means a screen before the display 33 is divided, as in the second embodiment. When the heading-up map is displayed on the first screen, that is, the screen before division of the display 33 (step SK7), the heading-up map is displayed on the second screen (step SK20). Further, the simplified diagram of FIG. 17 is displayed on the third screen (step SK24). Thereafter, other guidance / display processing is executed (step SK18). Then, the subroutine of FIG. 21 is terminated. When the subroutine of FIG. 21 is completed, the process returns to the main process of FIG.
[0168]
When the heading-up map is not displayed on the screen before division of the display 33 (step SK7), the north-up map is displayed on the second screen (step SK22). Further, a simplified diagram as shown in FIG. 17 is displayed on the third screen (step SK24). That is, the map displayed before the screen is divided is always displayed on the second screen. The third screen displays the minimum necessary guidance information such as the direction of the destination. Thereafter, other guidance / display processing is executed (step SK18). Then, the subroutine of FIG. 21 is terminated. When the subroutine of FIG. 21 is completed, the process returns to the main process of FIG.
[0169]
The second screen and the third screen are provided by dividing the screen of the display 33 as in the first and second embodiments. That is, the divided screen closer to the driver side is the third screen, and the divided screen closer to the passenger seat side is the second screen.
[0170]
16. Guide / display processing of the fourth embodiment
FIG. 22 shows a flowchart of the guidance / display processing of the fourth embodiment of the present invention. In this embodiment, in addition to the guide route obtained first, another guide route is newly searched according to the request of the operator (user). Then, the obtained new guidance route and the previously obtained guidance route are displayed on two divided screens, respectively. When further search is instructed, another guide route is searched again. When the newly searched guidance route is displayed on one screen, the other guidance route is displayed on the other screen. Thereby, it is possible to compare the original route with a new route or a plurality of different routes on the divided screen. This route comparison makes it easy to select a guide route that matches the operator's wishes.
[0171]
The flowchart of FIG. 22 will be described. First, it is determined whether or not the screen of the display 33 is in a divided state (step SL2). In the divided state, different guide routes that are independently searched are displayed on each screen. That is, in this embodiment, after the re-search operation described below is instructed, if the guide route is not determined by the operator, the processing in FIG. 22 is once ended, and the flow proceeds to the main processing in FIG. Returned. Then, when the subroutine of FIG. 22 is called again, the process executed immediately before is repeated again. That is, even if the re-search operation is instructed by the operator, if the guidance route determination is not input, the entire subroutine of FIG. 22 is repeatedly executed. In addition, the split screen state of the display 33 is maintained until the guide route determination operation by the operator is performed.
[0172]
If the screen is not divided (step SL2), it is determined whether or not another route search start command has been input (step SL4). This another route search start command is determined by whether or not icons such as “re-search” and “other route” displayed on the display 33 are touched by the operator. That is, an icon such as “re-search” is displayed on the screen of the display 33. Whether or not the operator touches this icon display portion is detected by a touch switch 34 attached to the display surface of the display 33.
[0173]
If an icon such as “re-search” is not touched, that is, if another route search is not instructed, “other guidance / display processing” is executed (step SL38). In this “other guidance / display process”, various types of audio information and image information are reported so that the host vehicle can satisfactorily operate on the initially obtained guidance route or the selected re-search guidance route. . Thereafter, the guidance / display processing of FIG. 22 is terminated, and the flow returns to the overall processing of FIG.
[0174]
On the other hand, when there is another route search operation (step SL4), the route number N is initialized to 1 (step SL6). The number of routes N means the number of searched guide routes. In addition, another route search operation means that an operator touches the character part of "other route" (FIG. 23) displayed on the screen of the display 33, for example. When another route search operation is performed, a guide route from the current position of the host vehicle to the registered destination is newly searched (step SL8). The guide route searched in step SL8 is different from the guide route in the guide process immediately before the re-search.
[0175]
In another route search in step SL8, processing similar to the route search processing in FIG. 5 is performed. That is, using each road data and intersection data recorded in the information storage unit 37, a route connecting from the current position of the host vehicle to the final guide point is searched. For example, when the own vehicle exists on the guidance target road, the intersection of the end point of the guidance target road is searched from the road data and the intersection data. Then, a road that is advanced in the shortest distance from each road starting from the intersection to the next intersection closer to the destination direction is searched. In this way, a road is advanced to an intersection existing in the direction of the destination, and roads with shorter distances are sequentially selected to search for a guide route.
[0176]
Here, a guide route search process will be briefly described. Information about the road is stored in the information storage unit 37, for example, with a connecting road connecting two branch points (intersection etc.) as one unit (FIG. 4). The information on each road includes length data of the road, shape data indicating the direction of the road, road attribute data indicating the type of the road, and the like. Therefore, a search cost converted to a road length is defined for these data values. For example, the search cost value is set to be smaller as the road width is wider. That is, if the number of lanes on the road is three lanes, a search cost of “10” is given. Conversely, if the number of lanes is 1, a search cost of “30” is given. Therefore, if the road width is large, the search cost is low, and if it is narrow, the search cost is high.
[0177]
Similarly, search costs are defined for road attribute data, shape data, and the like. The destination direction (geographic direction) of this road is determined by the destination direction data included in the original road data connected to this road. Therefore, the search cost is set to be smaller as the road direction based on the destination direction data is directed to the destination direction. Search costs may also be defined by prefectural roads, city roads, national roads, and the like. That is, the search cost may be defined so that a more general road is preferentially selected.
[0178]
The search cost is calculated using a predetermined numerical calculation table. In the case of the number of lanes, a numerical correspondence table (hereinafter referred to as a table) such as a search cost “10” for three lanes and a search cost “30” for one lane is recorded in advance in the information storage unit 37 or the ROM 4. ing.
[0179]
Then, the search cost for each value such as the road attribute and the destination direction is obtained from each table. The total sum of the obtained search costs is set as a comprehensive search cost of the road (hereinafter referred to as a comprehensive search cost). The road length may be used directly as the search cost, or the length may be multiplied by a coefficient. That is, the coefficient value uniquely determined by the length of the road is multiplied by the length value to obtain the length search cost. This coefficient may also be calculated by a numerical correspondence table (table). That is, a coefficient correspondence table uniquely determined according to the road length is recorded in the information storage unit 37 or the ROM 4.
[0180]
For example, if the length of the road is 10 km or less, the coefficient “1.0” is given. The length search cost is 10 * 1.0 = 10. Similarly, if the road is longer than 10 km and shorter than 20 km, the coefficient “3.0” is given. The search cost for the length of this road is 20 * 3.0 = 60. In this way, coefficients corresponding to the length of the road are sequentially given. This facilitates the comparison of search costs depending on the distance. These values are only examples, and the present invention is not limited to these values, and the search cost calculation may be performed using a calculation formula.
[0181]
In this way, the comprehensive search cost for each road is calculated. If there are a plurality of roads connected to one search start point (node or intersection), the total search cost of each road is obtained. Then, the obtained comprehensive search cost value of each road is added separately to the accumulated value of the comprehensive search cost of each road of the route searched so far. Then, the road that is the accumulated value of the smaller comprehensive search cost is selected as the optimum route.
[0182]
As the road connected to the selected road, a road having the smallest accumulated search cost value is selected in the same manner. That is, the roads are sequentially selected so that the accumulated value of the comprehensive search cost becomes smaller. The road that continues from the departure point (guidance start point) to the destination (guidance end point) searched in this way is stored in the RAM 4 as guidance route data MW. In the above case, a road that faces the destination direction and that has a wider road is preferentially selected.
[0183]
Further, the search cost may be increased when the roads are connected by turning right and left at the intersection. That is, a road that eliminates the left / right turn at the intersection as much as possible may be selected as the guide route. Similarly, at an intersection, the search cost may be determined to increase or decrease depending on the presence / absence of a traffic light or the presence / absence of an intersection name. For example, a search cost value is set to be larger at an intersection without a traffic signal than at an intersection with a traffic signal. Thereby, an intersection with better conditions is preferentially selected as an intersection of the guide route.
[0184]
In the above description of the search cost, the comprehensive search cost for a better-condition road is set to be small, but conversely, the comprehensive search cost for a good-condition road may be set to be large. . That is, the coefficient value multiplied by the length value may be set in inverse proportion so that the search cost value for a shorter road becomes larger. Similarly, the search cost for a wider road is set to be higher.
[0185]
For example, if the length of the road is 10 km or less, the coefficient “3.0” is given. The length search cost is 10 * 3.0 = 30. Similarly, if the road is longer than 10 km and shorter than 20 km, the coefficient “0.1” is given. The search cost for the length of this road is 20 * 0.1 = 2. In this case, the search cost for a short road becomes large.
[0186]
In the route search, when the own vehicle does not exist on the guidance target road, a node on the guidance target road closer to the own vehicle is selected. That is, the node of the guidance target road that is within a predetermined distance from the current position of the host vehicle is selected. In addition, when there are a plurality of guidance target road nodes close to the host vehicle, a node closer to the destination among the plurality of nodes is set as a guidance start point. Also in another route search in step SL8 (FIG. 22), if the current position of the host vehicle is not on the guidance target road, a node on a nearby guidance target road is set as a search start point. This is the same process as the route search process (step SA4) in FIG.
[0187]
In step SL8, a process is performed in which the guide route searched in the route search process of FIG. 5 or the road of the guide route currently being guided is not selected as a new guide route as much as possible. For example, a new search cost is added to the road search conditions already used for the guide route obtained in the previous search process. That is, for example, an extra value of the search cost “50” is added to each road constituting the guide route searched in the route search process of FIG. Thereby, the selection conditions of the road already used as a guidance route become worse. As a result, it is difficult to select this road in searching for a new guide route.
[0188]
Thus, the new guide route searched in step SL8 is stored in the RAM 5 as the Nth guide route. When this new guidance route is searched, the display screen of the display 33 is divided into left and right (step SL10). In this screen division process, the screen of the display 33 is divided into two parts on the left and right sides of the approximate center. The left screen is the second screen toward the display screen. The right screen is the third screen.
[0189]
Then, the Nth guide route searched in step SL8 is displayed on the second screen (step SL12). The (N-1) th guide route is displayed on the third screen (step SL12). The (N-1) th guide route here is the first guide route searched in the route search process of FIG. 5 or the route currently being guided. That is, N-1 = 0. The route of N = 0 is a route that is first searched or a route that is being searched again during traveling and is currently being guided. For example, the route of N = 0 includes a route searched when a destination before starting guidance by the navigation system is set. Or, it is a new guidance route selected again by the guidance / display processing of FIG. That is, the route with the route number N = 0 corresponds to the route currently being guided.
[0190]
However, when the re-search of the guide route is repeatedly commanded by the operator, the latest guide route is displayed on the second screen, and the oldest guide route searched immediately before is displayed on the third screen. .
[0191]
When the respective guidance routes are displayed on the second screen and the third screen, it is determined whether or not the “RETURN” icon displayed on the screen of the display 33 has been pressed (step SL16). Whether the icon “RETURN” is pressed or not is determined by turning on / off the touch switch 34.
[0192]
When "RETURN", that is, the return key is turned on, the guide routes displayed on the second screen and the third screen are each set as the previous guide route. By the way, when another route search command of the guidance / display processing of FIG. 22 is repeated, N guide routes are searched. Immediately before the return key is pressed, the latest Nth guide route is displayed on the second screen, and the (N-1) th guide route is displayed on the third screen. .
[0193]
When the return key is pressed in this state, the (N-1) th guide route is displayed on the second screen, and the (N-2) th guide route is displayed on the third screen. That is, when the return key is pressed, the display state of the display 33 is returned to the previous state. A series of these processes is performed by steps SL12 to SL20.
[0194]
That is, 1 is subtracted from the value of the route number N (step SL18). Then, it is determined whether or not the value of the number of routes N has become smaller than 1 by the process of step SL18 (step SL20). If the value of the number of routes N is not smaller than “1”, the process returns to step SL12 and the process is executed. That is, the guide route searched for immediately before is displayed on the second screen. Similarly, the guide route searched two times before is displayed on the third screen.
[0195]
Conversely, if the value of the number of routes N is smaller than “1”, there is no searched route older than the guide route of N = 0. Therefore, the first route searched in the route search process of FIG. 5 or the current route on which the guidance process has been executed is selected (step SL22). In this case, the screen display is also released from the divided state. Then, the map displayed before the division is displayed without changing the scale (step SL23). Thereafter, other guidance / display processing is performed (step SL38), and the guidance / display processing in FIG. 22 is once completed.
[0196]
Alternatively, when the number N of routes is smaller than “1” (steps SL22 and SL23), the state in which another route that has been re-searched first is displayed on the second screen and the original route is displayed on the third screen is retained. May be. In this case, the screen division may be canceled when one of the routes on the second and third screens is selected.
[0197]
Note that the processing of step SL16 is also performed when the guidance / display processing subroutine of FIG. 22 is called in the screen division state. That is, it is determined whether the return key is pressed or the route determination key described later is pressed in the split display state of the screen. When another route search is instructed once, the screen of the display 33 is divided. In the divided state, the divided state is continued unless the “RETURN” key is repeatedly pressed until the guide route on the second screen or the third screen is not selected by the operator or the number of routes N = 0. The
[0198]
However, when “RETURN” is repeatedly pressed until the guide route is selected or the number of routes N = 0, the divided state is released. And the guidance process by the determined guidance route is performed. Note that the guidance / display processing in FIG. 22 is repeatedly executed until the host vehicle reaches the final guidance point. However, another route search command is not allowed unless the vehicle is stopped or slowing down.
[0199]
If it is not detected in step SL16 that the return key, that is, the “RETURN” key is turned on, it is determined whether or not another route key has been pressed (step SL28). That is, whether or not the “other route” of the icon displayed on the display 33 is touched by the operator is determined by turning on / off the touch switch 34.
[0200]
When another route key is turned on, the number of routes N is incremented by “1” (step SL24). Then, a new guidance route is searched again. The searched new guide route is stored in the RAM 5 as the Nth guide route (step SL26). In the search for the guidance route in step SL26, the road used for the guidance route searched in the past is not easily selected. That is, when a road with a smaller overall search cost is selected, a new search cost is added to the road selected as the road constituting the guide route. Thereby, a plurality of guide routes configured by different roads are searched.
[0201]
Further, the search conditions for the guide route searched for in steps SL8 and SL26 may be set to search conditions different from the guide route searched for first. For example, if the first search route is a route that preferentially uses a toll road (highway), the second searched guide route is searched to be a route that does not use the toll road. Further, if the first guide route is a guide route that reaches the destination at the shortest distance, the second is searched so as to be a guide route that preferentially uses a wider road. Thus, each route search condition may be changed in repeated guide route searches.
[0202]
The guidance route searched in step SL26 is displayed on the second screen. In addition, the guidance route that has been displayed on the second screen until then is displayed on the third screen (step SL12). In addition, the 3rd screen may always display the guidance route first searched by the route search process of FIG. 5 or the guidance route currently being guided. In other words, the latest guidance route searched every time the “other route” key is pressed is displayed on the second screen. On the other hand, the currently guided route is always displayed on the third screen. Thereby, it is possible to directly compare the original guide route and the new guide route subjected to the re-search process.
[0203]
In the present embodiment, the guide route displayed on the third screen in the state where the number of routes N = 1 is not limited to the guide route searched in the route search process of FIG. That is, in the guidance / display process of FIG. 22, when a newly searched guidance route is selected as a guidance target route, this new guidance target road is set as a basic guidance route. Therefore, once another route search is instructed when guidance processing is being performed with a new guide route by another route search, the new guide route is displayed on the third screen of the divided screen.
[0204]
If it is not detected in step SL28 in FIG. 22 that another route key is turned on, it is determined whether or not the route determination key is turned on (step SL30). This route determination key is also displayed on the screen of the display 33 as the icon “route determination”. Then, the touch switch 34 determines whether or not the icon display portion is touched by the operator.
[0205]
If the route determination key is not pressed, “other guidance / display processing” in step SL38 is executed. Then, the process of FIG. 22 is once completed. On the contrary, when the route determination key is pressed, it is determined which guide route is selected on the second screen or the third screen (step SL32). The selection of the guidance route is also determined by turning on / off the touch switch 34. If the guide route of the second screen is selected, the screen division state of the display 33 is released. Then, the guidance route displayed on the second screen is displayed on the released single screen (first screen) (step SL34). Then, “other guidance / display processing” such as information display and notification for assisting the operation of the vehicle along the selected guidance route is executed (step SL38).
[0206]
The divided state of the display 33 is also released when the guide route on the third screen is selected. Then, the selected guide route is displayed on the screen of the display 33 that is a single screen (step SL36). Furthermore, “other guidance / display processing” such as information display and notification for assisting the operation of the vehicle along the selected guidance route is executed (step SL38). Thereafter, the processing of FIG. 22 is terminated, and the processing is returned to the flowchart of FIG.
[0207]
FIG. 23 shows a state of the display screen of the display 33 before the screen division. On the screen 104, the first guide route 162 searched by the route search process of FIG. 5 is displayed. Further, a symbol 100 indicating the current position and traveling direction of the host vehicle traveling on the guide route 162 is displayed. In addition, an icon 160 of “another route” that is a determination target in step SL4 is displayed on the screen 104.
[0208]
FIG. 24 shows a screen division state of the display 33. This screen division state shows the state of the screen of the display 33 immediately after step SL8 of FIG. 22 is executed for the first time. On the second screen 108, a new guide route 170 searched by the route search process in step SL8 is displayed. On the third screen 110, the guide route 162 displayed in FIG. 23 is displayed. In addition, icons 164, 166 and 168 are displayed on the second screen 108 and the third screen 110. The icon 164 represents “another route”. The icon 166 represents a “route determination” key that is a determination target of step SL30. The icon 168 represents the “RETURN” key that is the determination target in step SL16, that is, the return key.
[0209]
FIG. 25 shows the state of the display screen on the display 33 immediately after execution of step SL26 of FIG. On the second screen 108, a guide route 172 newly searched in step SL26 is displayed. On the third screen, the guide route 170 displayed on the second screen of FIG. 24 is displayed. The icons 164, 166, and 168 have the same functions as the icons in FIG.
[0210]
FIG. 26 shows a state where the screen of the display 33 is returned to a single screen by step SL36 of FIG. For example, in FIG. 25, the icon 166 is pressed, and the guide route 170 on the third screen 110 is selected. When the guide route 170 is selected, the divided screen is released. Then, the guide route 170 is displayed on the entire first screen 104 of a single screen. An icon 160 is also displayed on the screen 104 after the screen division is canceled.
[0211]
Further, in the fourth embodiment, the route displayed on each of the second and third screens may be freely selected. That is, when another route is searched N times, any one of the N different routes is displayed on the second screen. Similarly, any one of N different routes may be displayed on the third screen. Furthermore, the route displayed on the second screen or the third screen may be fixed. For example, the original route immediately before an instruction for re-searching for another route may be constantly displayed on the third screen. In addition, the scales of the maps displayed on the second and third screens are not particularly limited, and are scaled so that the entire route from the current position of the host vehicle to the destination is displayed on the entire divided screens. May be adjusted. Or the map display of each division | segmentation screen may be performed using the scale before division | segmentation.
[0212]
17. Guide / display processing of the fifth embodiment
FIG. 27 shows a flowchart of the guidance / display processing of the fifth embodiment of the present invention. In the guidance / display processing of the fifth embodiment, when the own vehicle deviates from the guidance route currently being guided, the return route to return to the guidance route and the newly searched another route or the original route are divided. Each is displayed on the screen.
[0213]
First, it is determined whether or not the traveling position of the host vehicle has deviated from the guidance route (step SP2). The current position information PI stored in the RAM 5 is compared with the geographical coordinates of the roads constituting the guide route data MW. Thus, it is determined whether or not the host vehicle is traveling on the guide route. If the host vehicle is traveling on the guidance route, “other guidance / display processing” is executed (step SP42). And the process of alerting | reporting and displaying the guidance information which assists the driving | running | working of a vehicle along a guidance path | route is performed. Thereafter, the process of FIG. 27 is terminated, and the process returns to the flowchart of FIG.
[0214]
However, when the host vehicle is removed from the guidance route, it is determined whether or not the screen is in a divided state (step SP4). In the screen split state, the two guide routes already searched are displayed on the left and right screens, respectively. In this case, the return key may be turned on or the route determination key may be turned on. Therefore, if the screen is divided, the process of step SP18 is executed.
[0215]
However, if the screen is not divided, it is determined whether or not a re-search command is input (step SP6). That is, it is determined whether or not an instruction to start a process for searching for a route to return to the currently guided route is given. This re-search command is determined based on whether or not icons such as “re-search” and “alternate route” displayed on the screen of the display 33 are touched by the operator. The presence / absence of a touch is determined by turning on / off the touch switch 34.
[0216]
If there is no re-search command, a map in which the vehicle is removed from the guidance route is continuously displayed on the display 33. In this case, information that warns that the vehicle is off the guide route may be notified at any time. If there is a re-search command, the route number N is initialized to “1” (step SP8). Then, a route that returns from the current position of the host vehicle to the guide route is searched. This search for the return route is a peripheral route search process. In this return route search, weighting is performed so that the selection condition of the road toward the guide route becomes more dominant. For example, a predetermined search cost value is added to the total search cost for a road traveling in a direction opposite to the traveling direction of the host vehicle so that the total search cost is increased. Similarly, a predetermined value is added to a road traveling in a direction opposite to the guide route direction so that the search cost increases. As a result, a road traveling in the guide route direction is preferentially selected.
[0217]
When a return route returning to the guidance route is searched in this way, this return route is set as the Nth (N = 1) th route (step SP10). Then, the screen of the display 33 is divided (step SP12). The Nth guide route is displayed on the second screen in the divided screen (step SP14). Here, N = 1, and the return route to the currently guided route is displayed on the second screen. The Nth guide route is displayed in a color or the like different from the guide route from which the host vehicle has come off. That is, the original guide route and the return route are displayed on the display 33 so that they can be identified.
[0218]
Furthermore, the (N-1) th guide route is displayed on the third screen. Here, N-1 = 0, which is the first guide route searched for in the route search process of FIG. 5 or the guide route when the host vehicle is removed. When the respective guidance routes are displayed on the second screen and the third screen, it is determined whether or not the “RETURN” icon displayed on the screen of the display 33 has been pressed (step SP18). Whether the icon “RETURN” is pressed or not is determined by turning on / off the touch switch 34.
[0219]
When "RETURN", that is, the return key is turned on, the guide routes displayed on the second screen and the third screen are each set as the previous guide route. In addition, when the all route search process of step SP30 described later is repeated, N guide routes are searched. Immediately before the return key is pressed, the latest Nth guide route is displayed on the second screen, and the (N-1) th guide route is displayed on the third screen.
[0220]
When the return key is pressed in this state, the (N-1) th guide route is displayed on the second screen, and the (N-2) th guide route is displayed on the third screen. That is, when the return key is pressed, the display state of the display 33 is returned to the previous state. A series of these processes is performed in steps SP14 to SP22.
[0221]
That is, when “RETURN”, that is, the return key is turned on, the value of the route number N is decremented by “1” (step SP20). Then, it is determined whether or not the value of the number of routes N has become smaller than “1” by the process of step SP20 (step SP22). If the value of the number of routes N is not smaller than “1”, the process returns to step SP14 and the process is executed. That is, the guide route searched for immediately before is displayed on the second screen. Similarly, the guide route searched two times before is displayed on the third screen.
[0222]
Conversely, if the value of the number of routes N is smaller than “1”, there is no searched route older than the guide route of N = 0. In this case, the guidance route on which the guidance has been performed is selected when the host vehicle is removed (step SP24). Then, the state before the division, that is, the original route and the own vehicle deviating from the route are displayed on one map screen (step SP25). Thereafter, other guidance / display processing is executed (step SP42), and the guidance / display processing in FIG. 27 is temporarily terminated. In this case, the route guidance process is not performed, and the original route and the host vehicle deviating from the route are displayed on a single screen.
[0223]
In addition, when the “RETURN” key is turned on in the state where the number of routes is N = 1, the return route is displayed on the second screen, and the guidance route on which the host vehicle is removed is displayed on the third screen instead of canceling the division. The displayed state may be maintained. In this case, the screen split state may be canceled for the first time when either the second screen or the third screen is selected. Further, when the “RETURN” key is pressed in the state where the number of routes N = 1, it is determined that the return to the original guide route is requested, and the return route on the second screen is forcibly selected. good.
[0224]
Note that the processing of step SP18 is also performed first when the vehicle deviates from the original guidance route and the subroutine of the guidance / display processing of FIG. 27 is called in the screen split state. That is, it is determined whether or not the return key is pressed or the route determination key or the like described later is pressed in the split display state of the screen. When the re-search command is input once, the screen of the display 33 is divided. In this divided state, if the return route (RETURN) is not repeatedly pressed until the guide route on the second screen or the third screen is not selected by the operator or the number of routes N = 0, the divided state continues. Is done. However, when a guide route is selected, the divided state is canceled and a single screen is displayed, and guidance processing using the determined guide route is executed.
[0225]
Note that the guidance / display processing in FIG. 27 is repeatedly executed until the host vehicle reaches the final guidance point. Furthermore, the scale of the map displayed on the second screen and the third screen is not particularly limited in the present embodiment, but when another route that has been re-searched is displayed, the entire route is displayed on the screen. Anyway. Alternatively, the map may be displayed on the second screen and the third screen at the scale of the map displayed on the first screen before the division.
[0226]
If it is not detected in step SP18 that the return key, that is, the “RETURN” key is turned on, it is determined whether or not the re-search key is pressed (step SP32). That is, whether or not “re-search” of the icon displayed on the display 33 is touched by the operator is determined by turning on / off the touch switch 34.
[0227]
When the re-search key is turned on, the route number N is incremented by “1” (step SP28). Then, a new guidance route is searched. The searched new guide route is stored in the RAM 5 as the Nth guide route (step SP30). In the search for the guide route in step SP30, the road used for the guide route searched in the past is not easily selected. That is, when a road with a lower overall search cost is preferentially selected, a new search cost is added to the road already selected as the road constituting the guide route. Thereby, a plurality of guide routes configured by different roads are searched. The whole route search in step SP30 is executed in the same manner as in step SL8 in FIG.
[0228]
In addition, the search condition for the guide route searched in step SP30 may be set to a search condition different from the guide route searched for first. For example, if the first search route is a route that preferentially uses a toll road (highway), the second searched guide route is searched to be a route that does not use the toll road. Further, if the first guide route is a guide route that reaches the destination at the shortest distance, the second is searched so as to be a guide route that preferentially uses a wider road. Thus, each route search condition may be changed in repeated guide route searches.
[0229]
The guidance route searched in step SP30 is displayed on the second screen. Moreover, the guidance route that has been displayed on the second screen until then is displayed on the third screen (step SP14). In addition, the 3rd screen may always display the guidance route first searched by the route search process of FIG. 5 or the guidance route currently being guided. That is, on the second screen, the latest guide route searched every time the “re-search” key is pressed is displayed. On the third screen, a guidance route from which the vehicle has been removed is displayed. As a result, the original guide route can be directly compared with a new guide route for each search process.
[0230]
Furthermore, the route displayed on each of the second and third screens may be freely designated and displayed by the number N of routes. That is, when the re-search is performed N times, one of N routes may be arbitrarily selected and displayed on each of the second and third screens.
[0231]
In the present embodiment, the guide route displayed on the third screen in the state where the number of routes N = 1 is not limited to the guide route searched in the route search process of FIG. That is, in the guidance / display processing of FIG. 27, when a newly searched guidance route is selected as a guidance target route, this new guidance target road is set as a basic guidance route. Therefore, once the guidance process is performed using the new guidance route by the re-search, when the re-search is instructed again, the new guidance route is first displayed on the third screen of the divided screen.
[0232]
If it is not detected in step SP32 that the re-search key is turned on, it is determined whether or not the guidance start (route determination) key is turned on (step SP34). When the peripheral route search process in step SP10 is executed, the return route is displayed on the second screen. In addition, the initial guidance route is displayed on the third screen, but the host vehicle is not on this guidance route. Therefore, when route guidance is requested through the guidance route on the third screen, route guidance may be performed using the return route on the second screen. Therefore, when the return route is displayed on the second screen, the icon “start guidance” is displayed on the second screen. In step SP34, it is determined whether or not this guidance start key has been pressed.
[0233]
Further, when the third screen (deviated guide route) is selected in the state where the number of routes N = 1, no guidance start may be performed. In this case, the screen is returned to the single screen before division. That is, the guide route from which the host vehicle has been removed and the host vehicle are displayed on the screen. That is, processing similar to that in the state where the number of routes N = 1 and the “RETURN” key is pressed (steps SP24 and 25) is performed.
[0234]
However, if the search for all routes in step SP30 is repeated, the icon “route determination” is displayed on the screen of the display 33 as in the fourth embodiment. Then, it is determined by the touch switch 34 whether or not the icon display portion is touched by the operator (step SP34).
[0235]
If the guidance start (route determination) key is not pressed, “other guidance / display processing” in step SP42 is executed. Then, the process of FIG. 27 is once completed. On the contrary, when the route determination key is pressed, it is determined which guide route is selected on the second screen or the third screen (step SP36). The selection of the guidance route is also determined by turning on / off the touch switch 34. If the guide route of the second screen is selected, the screen division state of the display 33 is released. Then, the guidance route displayed on the second screen is displayed on the released single screen (first screen) (step SP38). Then, “other guidance / display processing” such as information display and notification for assisting the operation of the vehicle along the selected guidance route is executed (step SP42).
[0236]
The divided state of the display 33 is also released when the guide route on the third screen is selected. Then, the selected guide route is displayed on the screen of the display 33 that is a single screen (step SP40). Further, “other guidance / display processing” such as information display and notification for assisting the operation of the vehicle along the selected guidance route is executed (step SP42). Thereafter, the process of FIG. 27 is terminated, and the process returns to the flowchart of FIG. As for the display map scale after the division is canceled, the display scale before the division may be used or a different scale may be used.
[0237]
FIG. 28 shows a state of the display screen of the display 33 before the screen division. On the screen 104, the first guide route 162 searched by the route search process of FIG. 5 is displayed. Further, a symbol 100 indicating the current position and traveling direction of the host vehicle deviating from the guide route 162 is displayed. In addition, a “re-search” icon 174 that is a determination target in step SP4 is displayed on the screen 104.
[0238]
FIG. 29 shows a screen division state of the display 33. This screen division state shows the state of the screen of the display 33 immediately after step SP10 of FIG. 27 is executed. On the second screen 108, the return route 178 searched by the peripheral route search process in step SP10 is displayed. On the third screen 110, the guide route 162 displayed in FIG. 28 is displayed. In addition, icons 174, 176, and 168 are displayed on the second screen 108 and the third screen 110, respectively. The icon 174 represents “re-search”. The icon 176 represents a “guidance start” key that is a determination target in step SP34. The icon 168 represents a “RETURN” key that is a determination target in step SP18, that is, a return key.
[0239]
FIG. 30 shows the state of the display screen of the display 33 immediately after step SP30 of FIG. 27 is executed. On the second screen 108, the guide route 180 newly searched in step SP30 and the guide route 162 searched first are displayed. On the third screen, the return route 178 displayed on the second screen of FIG. 29 is displayed. The icons 174 and 168 have the same functions as the icons in FIG. The icon 166 is a route determination key and corresponds to the “guidance start” icon in FIG. In addition, although two guide routes are displayed on the second screen 108 in FIG. 30, only the guide route 180 may be displayed.
[0240]
FIG. 31 shows a state where the screen of the display 33 is returned to a single screen by step SP40 of FIG. For example, in FIG. 30, it is assumed that the icon 166 is pressed and the return route 178 on the third screen 110 is selected. When the return route 178 is selected, the split screen is released. Then, the return route 178 and the guide route 162 are displayed on the entire first screen 104 of a single screen. An icon 174 is also displayed on the screen 104 after the screen division is canceled.
[0241]
FIG. 32 is a diagram showing another embodiment of FIGS. 24 and 25 of the fourth embodiment and FIG. 30 of the fifth embodiment. In this embodiment, distance and time information 186 is displayed in accordance with the guidance route display. In this distance and time information, the distance along the route to the final guidance point along the route and the time required for arrival at the final guidance point are displayed. For example, in the case of FIG. 32, the distance along the route when traveling to the final guidance point by the guide route 182 and the required time when traveling at the legal speed for the distance are displayed as information 186.
[0242]
Also on the third screen 110 of FIG. 32, the travel distance to the final guide point of the guide route 184 and the required time required to travel the distance are displayed in the distance and time information 186. FIG. 33 shows a state in which step SL26 and the like in FIG. 22 are executed and the display of the guide route is switched from FIG. In the distance and time information 186 in FIG. 33, a travel distance to the final guide point of the guide route 188 and a required time required to travel the distance are displayed. Note that the second screen of FIG. 32 is copied on the third screen 110 of FIG.
[0243]
32 and 33, the following information may be displayed in the distance and time information 186 for displaying information such as the distance of the route. That is, the VICS information (information on a congested road in the route, construction information, etc.) received by the data transmitting / receiving device 27, the number of right / left turns on the route, and the like may be displayed. The VICS information may include not only road congestion information but also congestion information of parking lots around the route.
[0244]
Furthermore, the names of central roads (national roads, prefectural road names, etc.) constituting the guide route and main intersection names (only intersections with names) may be displayed. Such road names, intersection names, and the like may be displayed in a list format when the “route information” key displayed on the screen is turned on. That is, the “route information” icon is displayed on the screen. When the icon “route information” is turned on by the operator, detailed information (such as a road name) of each guide route displayed on the second and third screens is displayed. This detailed information may include the distance to the destination of the guidance route, the required time, VICS information, and the like. As a result, more information that contributes to the selection of the route is displayed in a variety of ways, so that it becomes easier to compare the routes.
[0245]
Furthermore, in each of the “different route search”, “neighboring route search”, and “all route search” search processes in the fourth and fifth embodiments, the traffic information received from outside such as VICS is included in the search cost. It may be added. In other words, a route that bypasses a congested road may be searched by making it difficult to select the congested road based on the congestion information of the road received from the outside.
[0246]
In the fourth and fifth embodiments, each divided display screen may be displayed as a heading-up screen, a north-up screen, or an absolute orientation that faces one of the four directions of the screen. .
[0247]
18. Guide / display processing of the sixth embodiment
FIG. 34 shows a flowchart of the guidance / display processing of the sixth embodiment. In the sixth embodiment, when the travel position of the host vehicle deviates from the first guidance route, the screen is divided into two. On the second screen, a road map including a part of the guide route that has deviated and the vicinity of the current position of the vehicle is displayed. On the third screen, all the re-searched routes that are the original guide route or the new guide route to the destination displayed before the division are displayed. The original guide route from which the host vehicle has been removed is a route searched by the route search process (step SA4) in FIG. 5 or the all-route re-search (step SR20) described later. Further, the return route for returning to the original guide route is not immediately displayed on the second screen immediately after the screen division. However, when the operator instructs the start of guidance by the return route, the return route is clearly displayed on the screen. The scale of the road map displayed on the second screen is adjusted so that the entire return route is displayed on the second screen.
[0248]
FIG. 34 will be described. First, it is determined whether or not the current position of the host vehicle is on the guidance route (step SQ2). This determination process is performed as follows. Current position information PI and guidance route data MW are read from the RAM 5. It is determined whether or not the coordinates indicated by the current position information PI substantially match the geographical coordinates of the roads constituting the guide route data MW. If they match, the host vehicle is traveling on the guide route. Conversely, if they do not match, the host vehicle is traveling off the guide route.
[0249]
If the host vehicle is on the guidance route, it is determined whether the screen of display 33 is in a divided state (step SQ14). The division state of the display 33 is stored in the RAM 5 as the screen state GJ. Therefore, whether or not the display 33 is in a divided state is determined based on the data of the screen state GJ. If the screen of the display 33 is divided, single screen processing is executed (step SQ16). In this single screen process, the screen division state of the display 33 is canceled. Then, the road map displayed on the third screen is displayed on the entire screen of the display 33.
[0250]
It should be noted that even though the host vehicle is on the guide route (step SQ2), the screen is in a divided state means that the host vehicle has once deviated from the guide route and then returned to the guide route again. To do. In other words, when the host vehicle deviates from the guide route, the screen is divided into a route off process described later. However, in the divided state, when an operation such as route search or route change is not performed by the operator and the original guidance route is restored as it is, the processes of steps SQ2, SQ14, and SQ16 are executed.
[0251]
This is executed when the host vehicle is temporarily removed from the guide route by the operator's intention, but is returned to the guide route again by the operator's judgment. In other words, while traveling on a guide route, if there is a sudden use of a facility near the route, it is temporarily removed from the guide route, but may be returned to the guide route again after the end of this use. . By the way, in the conventional navigation apparatus, when it is detected that the own vehicle has deviated from the guide route with the auto reroute mode set, a new guide route from the current position of the own vehicle to the destination is created. , It will be re-searched automatically.
[0252]
However, this new guide route cannot always be reached with the shortest distance in the direction of the destination. Rather, there are cases where it is possible to reach the destination more quickly by returning to the original guidance route. In such a case, the guidance route is not automatically re-searched, and it is better that the own vehicle is returned to the original guidance route by the will of the operator. Therefore, when the own vehicle is returned to the original guide route again by the operator's will in the state where the auto reroute mode is not set, the processes of steps SQ2, SQ14, and SQ16 are executed. The auto-reroute mode is a mode in which it is detected that the host vehicle has deviated from the route being guided and the route from the current position of the host vehicle to the destination is automatically re-searched.
[0253]
In FIG. 34, if the screen is not divided (step SQ14) or the screen division is canceled (step SQ16), other guidance / display processing is executed (step SQ26). That is, various information is displayed and notified so that the host vehicle can travel well along the currently selected guide route. For example, when approaching an intersection that turns right or left, the distance to the intersection is displayed on the display 33. After such “other guidance / display processing” is performed, the processing in FIG. 34 is terminated and the processing returns to the main processing in FIG. 5.
[0254]
On the other hand, if the host vehicle is off the guide route (step SQ2), it is determined whether or not the guide process is being performed by the return route (step SQ3). That is, it is determined whether or not a return to the original route is in progress based on a return route searched by a “route off process” in a subroutine described later. If the guidance process using the return route is in progress, the single screen selection and the second and third screen display processes after step SQ20 are executed. The determination in step SQ3 is performed to prevent the “off-route processing” from being erroneously executed when the processing in FIG. 34 is repeatedly executed. The processing after step SQ20 will be described later.
[0255]
If the guidance process based on the return route is not in progress, the “route off process” subroutine is executed (step SQ4). The subroutine “off-route processing” will be described in detail later. In this “out-of-route process”, the screen of the display 33 is first divided. The screen is divided into left and right screens, with the approximate center of the display screen of the display 33 as a boundary. The left screen is the second screen and the right screen is the third screen toward the display screen. In this screen division, the video memory in which the image data is written is divided into two areas according to the screen division state. Then, independent image data is written in each divided area, so that the display screen of the display 33 is divided and displayed. The display 33 may be composed of two display devices from the beginning.
[0256]
After the screen is divided into two parts, a return route that returns to the original guidance route that has deviated is searched. This return route is used when a road map around the current position of the vehicle is displayed on one of the divided screens (second screen). In addition, if the mode of the navigation device is set to the auto reroute mode, the route from the current position of the host vehicle to the final guide point is automatically re-searched. In addition, the return route is not clearly shown on the second screen immediately after the division, and a road map around the current position of the host vehicle is displayed.
[0257]
FIG. 40 shows a state of the display 33 immediately after the host vehicle has deviated from the guide route 146 searched for first. A symbol 100 indicates the current position and traveling direction of the host vehicle. The screen of the display 33 before the division is the first screen. In the lower part of the first screen, icons 250, 256, and 252 such as characters “reduced”, “enlarged”, and “all routes” are displayed. When the “reduction” icon 250 is touched by the operator, the scale of the map displayed on the first screen is reduced and a wide area map is displayed.
[0258]
Further, when the “enlarge” icon 256 is touched by the operator, the scale of the map displayed on the first screen is enlarged, and the detailed map or the house map is displayed. When the “all routes” icon 252 is touched by the operator, the guide route from the current position of the host vehicle to the final guide point is searched again.
[0259]
FIG. 41 shows the state of the display screen on the display 33 immediately after the “route off process” is executed. On the second screen 108, the guide route 146 and the own vehicle deviating from the guide route 146 are displayed as a symbol 100. On the third screen 110, the map displayed on the first screen, which is the screen before the division, is displayed at the same scale. Further, an “all routes” icon 252, a “guidance start” icon 255, a “reduction” icon 250, and an “enlargement” icon 256 are displayed at the bottom of the second screen 108. The “guidance start” icon 255 is used for instructing the guidance start by the return route.
[0260]
In FIG. 34, when the “route off process” of the subroutine is executed and a return route or all routes are searched, it is determined whether or not the guidance start key is detected (step SQ6). As described above, the guidance start key displays the character “guidance start” as an icon on the second screen. Then, whether or not the “guidance start” display portion is touched by the operator is determined by a switch signal output from the touch switch 34.
[0261]
The ON of the “guidance start” key is used to determine whether or not to perform guidance processing using a return route that returns to the original guidance route. Therefore, if the “guidance start” key is turned on, the processing after step SQ18 in FIG. 34 is executed. That is, the return route is clearly indicated on the second screen, and a predetermined guidance process is executed. However, if the “guidance start” key is not turned on (step SQ6), the next condition determination is executed. That is, it is determined whether or not all the re-searched routes from the current position of the host vehicle to the destination are designated (step SQ8). This re-search of all routes is performed in the auto-reroute mode or when a re-search is instructed by the operator.
[0262]
When this all new route is selected, it is stored in the RAM 5 as a new guide route instead of the guide route for which the guide process has been executed (step SQ10). Further, the division state of the display 33 is canceled in order to display this new guidance route on the entire screen (step SQ12). That is, the screen divided into two is returned to one screen, and a new guidance route is displayed on the single screen. Thereafter, “other guidance / display processing” for performing information notification / display along the new guidance route is performed (step SQ26). Then, the processing in FIG. 34 is once ended, and the flow returns to the overall processing in FIG. Note that the scale before the division (first screen) is used as the scale of the new guide route displayed on the single screen.
[0263]
On the other hand, when the “guidance start” key is turned on (step SQ6), the return route searched at the time of screen division is clearly displayed on the second screen (step SQ18). Thereafter, it is determined whether or not the return route is displayed on one screen (step SQ20). This is determined based on, for example, whether or not the “screen release” icon displayed on the screen of the display 33 is touched by the operator. If screen release is selected, single screen processing is executed (step SQ12).
[0264]
In this single screen processing, the display screen of the divided display 33 is released, and the return route and the original guidance route are displayed on the single screen. Note that the scale of the single screen display of the return route is the map scale at the time of the second screen display or the scale of the map displayed on the first screen before the division. After the single screen process, the other guide / display process (step SQ26) is performed, and then the process of FIG. 34 is temporarily ended.
[0265]
If the single screen display of the return route is not selected (step SQ20), the subroutine “second screen display adjustment” is executed as the host vehicle moves (step SQ22). In this “display adjustment of the second screen”, the display position of the host vehicle displayed on the second screen or the map scale is adjusted. That is, although the return route and the own vehicle are displayed on the second screen, the following two methods are provided for this display method. In the first display method, the return route is displayed on the entire second screen around the host vehicle. In the second display method, the return route is displayed on the entire second screen, and the host vehicle is displayed so as to move on the return route. That is, in the second display method, the display position of the host vehicle is moved on the second screen as the host vehicle travels. The “second screen display adjustment” by the first or second display method will be described later.
[0266]
After the “second screen display adjustment”, a subroutine “third screen display process” is performed (step SQ23). In this subroutine “third screen display process”, the map displayed on the first screen before the screen division is displayed on the third screen as it is. In this third screen, the display map is scrolled as the vehicle travels. Thereafter, “guidance processing of voice and the like of the selected route” which is processing such as notification of voice information by the return route is executed (step SQ24).
[0267]
Note that on the third screen, the map is displayed in the north up or heading up state implemented in the second embodiment. After step SQ24 is executed, “other guidance / display processing” is executed (step SQ26). Then, the process returns to the main flowchart of FIG. The map scale on the third screen may be changed according to the traveling position of the host vehicle.
[0268]
19. Off-route processing of the sixth embodiment
FIG. 35 shows a flowchart of the “out-of-route processing” of the subroutine in FIG. First, it is determined whether or not the vehicle deviating from the route being guided is traveling on a return route returning to this route (step SR2). That is, after the series of processes in FIG. 35 is executed, the return route has already been searched. After the return route search, if an operation such as route selection by the operator is not performed, the processing in FIG. 35 is repeatedly executed. If the host vehicle is not on the return route, “return route search processing” is executed (step SR4). The state where the host vehicle is not on the searched return route includes a state where no return route is searched. That is, it is a state immediately after the host vehicle deviates from the original route. However, if the host vehicle is on the return route already searched, the return route search process is passed. In this “return route search process”, the same process as the route search process in the fifth embodiment of the guidance / display process is executed.
[0269]
That is, a search for a route connected to the guide route from which the host vehicle has come off is performed. In addition, in this return route search, weighting is performed so that the selection condition of the road toward the original guide route becomes more dominant. For example, a predetermined search cost value is added to the total search cost for a road traveling in a direction opposite to the traveling direction of the host vehicle so that the total search cost is increased. Similarly, a predetermined value is added so as to increase the search cost for a road traveling in the guide route direction and a road traveling in the opposite direction. As a result, a road traveling in the guide route direction is preferentially selected.
[0270]
Then, the shortest route connecting the intersection on the destination side closest to the point of the guide route from which the host vehicle has deviated and the current position of the host vehicle is searched. However, when a route connecting the current position of the host vehicle and the intersection cannot be found, a route connecting the next closest destination side intersection and the host vehicle is searched. In this way, a return route that connects the current position of the host vehicle and the intersection of the original guide route that is closer to the destination than the point where the host vehicle is removed is searched for.
[0271]
If a return route is searched or if the host vehicle is already on the return route, it is determined whether or not the screen of the display 33 is divided (step SR6). If it is not in the screen division state, the screen division processing of the display 33 is executed (step SR8). That is, the image memory into which the displayed image data is written is divided into regions so as to match the screen division. Here, as in the above embodiments, the screen 33 of the display 33 is divided into left and right with the screen center as a boundary.
[0272]
The left screen is the second screen, and the right screen is the third screen. The screen before the division is the first screen. If the display 33 is in the divided state, the screen dividing process in step SR8 is not executed (step SR6). That is, once the host vehicle deviates from the route being guided and the processes of FIGS. 34 and 35 are executed, the screen of the display 33 is divided. Thereafter, if an operation such as route selection is not performed, the screen division state is maintained. In this case, the screen division process in step SR8 is not performed.
[0273]
When the screen is divided by the process of step SR8, a subroutine “initial display of the second screen” is executed (step SR10). In this “initial display of the second screen”, the host vehicle and the guidance route that has deviated are displayed on the second screen at the optimum scale. That is, the connection point (intersection etc.) to the original guide route in the return route searched in step SR4 and the own vehicle are displayed on the second screen at an appropriate scale. In this “initial display of the second screen”, the return route itself is not specified. However, the return route is displayed on the second screen only after the guidance start key in step SQ6 of FIG. 34 is turned on. This “initial display of the second screen” will be described later.
[0274]
After “initial display of the second screen”, it is determined whether or not the mode of the navigation device of the embodiment is the auto-reroute mode (step SR12). If it is the auto route mode, it is determined whether or not the current position of the host vehicle is on all the routes searched again (step SR16). In the processing of steps SR12, SR16, etc., if the navigation device is set to the auto-reroute mode and the route is not designated by the operator after all new routes have been searched again, the processing in FIGS. . Therefore, the process of step SR16 is executed to prevent all new routes from being searched again.
[0275]
By the way, when the own vehicle is not on all the re-searched routes, a state in which all the routes are not re-searched is included. Therefore, if the host vehicle is not on the new route that has been searched again, the entire route from the current position of the host vehicle to the final guide point is searched again (step SR20). Then, all the new routes that have been searched again are displayed on the third screen. In addition, the original guidance route from which the own vehicle has come off may be displayed together on the third screen. The display scale of the third screen may be the scale of the first screen before division. Alternatively, when a new all route is displayed, the scale may be adjusted so that the entire route is displayed on the screen. Further, when all the new routes are displayed, the unique information of the newly searched route may be displayed at the same time as shown in FIGS. 32 and 33 of the fifth embodiment. That is, information such as the total distance of the route from the current position of the host vehicle to the destination and the predicted travel time, main road name, main intersection name, and the like may be displayed at the same time. The new route specific information may be displayed in a list format according to the operator's selection.
[0276]
When all the re-routed routes are displayed on the third screen, the process in FIG. 35 is terminated and the process returns to the process in FIG. If the mode is not the auto-reroute mode (step SR12), the map displayed on the screen (first screen) of the display 33 before the division is displayed on the third screen (step SR14). That is, a map is displayed in which the host vehicle deviating from the original route is the center of the third screen. In addition, the map scale before a division | segmentation is used for the scale used for the map display on this 3rd screen. Further, a map including the host vehicle, the destination, and the original guidance route may be displayed on the third screen. That is, the map scale may be adjusted and the entire original route may be displayed. Alternatively, the map may be displayed on the third screen at the same scale as that used for the map display on the second screen.
[0277]
When the map display on the third screen is finished (step SR14), it is determined whether or not all route keys are turned on (step SR18). Whether all the route keys are on / off is determined by whether or not the icon “all routes” displayed on the display 33 is touched by the operator. The presence or absence of a touch is determined by a detection signal from the touch switch 34. If the all-route key is turned on, the above-described “all-route re-search process” is executed (step SR20). Thereafter, all the re-searched routes are displayed on the third screen (step SR22).
[0278]
If all the route keys are not pressed, the processing in FIG. 35 is terminated, and the flow returns to the processing in FIG.
[0279]
20. First embodiment of initial display of second screen
FIG. 36 shows a first example of the “initial display of the second screen” in FIG. In the “initial display of the second screen” in FIG. 36, the map is displayed in a scale that can display the entire return route searched as map information for returning to the original route so that the current position of the host vehicle is at the center of the screen. Displayed on two screens. However, the return route itself is not clearly shown on the second screen.
[0280]
First, the node coordinate values of each road constituting the return route and a part of the original route from which the host vehicle has deviated are read from the node data file F3 or the like (step ST2). The maximum value (Emax, Nmax) and minimum value (Emin, Nmin) in the east longitude direction and the north latitude direction are searched from the coordinate values of each node read out in step ST2 (step ST4). The maximum and minimum values in the east longitude and north latitude direction will be described with reference to FIG.
[0281]
For example, in FIG. 47, if the route PC10 connected from the node P20 to the node P24 is a part of the original guide route, the route PC12 indicated by the dotted line and the route PC11 indicated by the one-dot chain line are set as the return route. That is, the node P22 is a point where the host vehicle has deviated from the original route (hereinafter, a separation point (a departure point)). The node P12 is a junction (return point) between the searched return route and the original guide route. From the current position P10 of the host vehicle to the node P12 at the confluence is the non-traveling route of the return route. Further, it is assumed that the route PC11 from the separation point node P22 to the current position P10 of the host vehicle is a path on which the host vehicle deviates from the original guide route. It is assumed that the destination in the original guide route is in the direction of node P24. Further, the upper direction in FIG. 47 is the north direction of the absolute direction. The return route is searched immediately when the host vehicle deviates from the original route. Therefore, in practice, the route PC11 is also a part of the return route. Here, for convenience of explanation, it is assumed that the host vehicle has moved on the return route to the current position P10.
[0282]
When the return route of FIG. 47 is displayed on the second screen, the entire return route of the route PC 12 and the route PC 11 and the route connecting the next nodes are displayed. That is, the original route connecting the node P28 on the departure side and the node P24 on the destination side, adjacent to the node P12 at the junction point, is displayed on the second screen together with the return route. In the second screen display of the return route, the original route from the separation point node P22 to the junction point node P12 and the return route may all be displayed on the second screen.
[0283]
In the case of the return route (route PC11 and route PC12) in FIG. 47, the node having the maximum coordinate value in the east longitude direction is the node P24. Therefore, the east longitude coordinate value of the node P24 is stored in the RAM 5 as the maximum value Emax. Similarly, if the node having the maximum coordinate value in the north latitude direction is the node P12, the north latitude coordinate value of this node P12 is stored in the RAM 5 as the maximum value Nmax.
[0284]
If the node having the minimum coordinate value in the east longitude direction is the node P14, the east longitude coordinate value of the node P14 is stored in the RAM 5 as the minimum value Emin. If the node having the minimum coordinate value in the north latitude direction is the node P16, the north latitude coordinate value of the node P16 is stored in the RAM 5 as the minimum value Nmin.
[0285]
When the original route is also displayed on the second screen, the following nodes and routes may be included. That is, the original route connecting the node P24 that is one destination from the junction P12 and the node P26 that is on the departure side from the node P22 that is the separation point is displayed on the second screen together with the return route. May be. In this case, the node having the maximum coordinate value in the east longitude direction is the node P24. Similarly, the node having the maximum coordinate value in the north latitude direction is the node P20. The node having the minimum coordinate value in the east longitude direction is the node P26. The node having the minimum coordinate value in the north latitude direction is the node P16. Then, the coordinate values of each node are stored in the RAM 5 as maximum values (Emax, Nmax) and minimum values (Emin, Nmin) in the east longitude direction and the north latitude direction.
[0286]
When the maximum value (Emax, Nmax) and the minimum value (Emin, Nmin) are detected as described above, the following formula is calculated from the coordinates (GX, GY) of the current position P10 of the host vehicle.
[0287]
｜ GX −Emax | (1)
｜ GX -Emin ｜ ・ ・ ・ (2)
In (1) and (2), the absolute value of the calculation result is obtained. Then, the larger one of the values of the expressions (1) and (2) is stored in the RAM 5 as the east longitude width WE (step ST6).
[0288]
Further, the following formula is calculated.
[0289]
| GY -Nmax | (3)
| GY -Nmin | (4)
The absolute value can also be obtained from equations (3) and (4). Then, the larger value in the expressions (3) and (4) is stored in the RAM 5 as the north latitude width WN (step ST8).
[0290]
Then, a map scale capable of displaying the east longitude width WE and the north latitude width WN is obtained using a numerical value calculation table or the like recorded in the information storage unit 37 in advance. That is, on the second screen, a road map in which the return route is included so that the own vehicle is at the center of the screen is displayed. The scale at which this road map is displayed is obtained using a numerical value calculation table (step ST10).
[0291]
This will be specifically described with reference to FIG. The state of the divided display 33 is displayed in FIG. The effective display area of the second screen 108 has a horizontal width HC6 and a vertical height HC14. A road map including a return route and the like is displayed in an area having an area about 5% smaller than the effective display area.
[0292]
Here, an area that is about 5 percent smaller than the effective display area is a range of the horizontal width HC4 and the vertical height HC10. The map scale is determined so that the east longitude width WE falls within the half width HC2 of the horizontal width HC4 and the north latitude width WN falls within the half height HC8 of the vertical height HC10. The reason why the map display area including the return route is made smaller than the effective display area, that is, the maximum area of the display screen is to prevent the display of valid information at the screen edge. is there. That is, if valid information is displayed at the edge of the screen, it may be difficult to see the information.
[0293]
The numerical value calculation table stores data representing the numerical correspondence between the values of the east longitude width WE and the north latitude width WN and each map scale value. Therefore, when the east longitude width WE and the north latitude width WN are obtained by the above formulas, the map scale value corresponding to the east longitude width WE and the north latitude width WN is obtained from the numerical value calculation table. The map scale may be obtained by a calculation such as a proportional expression.
[0294]
For example, when the map scale is “MSA”, the geographical distance of the map that can be displayed is known from the actual size of the second screen. Therefore, when the map scale is “MSA”, the geographical distance in the vertical direction of the screen displayed on the second screen is “MYA”, and the geographical distance in the horizontal direction of the screen is “MXA”. If the displayable geographical distance with respect to the map scale is known, an appropriate scale for displaying the road map having the east longitude width WE and the north latitude width WN can be obtained by the following equation.
[0295]
MSA * WE / MXA (5)
MSA * WN / MYA (6)
Of the scales given by the equations (5) and (6), a scale having a large value (a scale capable of displaying a wide area map) is selected as an appropriate scale. In the numerical value calculation table, map scales based on the calculation results of equations (5) and (6) for each east longitude width WE and north latitude width WN are stored. The calculations of (5) and (6) are used when the north-up map is displayed on the second screen.
[0296]
When the heading-up map is displayed, correction calculation is performed on each east longitude width WE and north latitude width WN with the following values. That is, a cosine value is obtained from relative azimuth angle data Dθ representing the traveling direction angle of the host vehicle with respect to the absolute azimuth. Then, the cosine value is multiplied by the distance of the hypotenuse of the triangle composed of the east longitude width WE and the north latitude width WN. A map scale in which this multiplication value falls within the width HC2 and height HC8 in FIG. 48 is obtained.
[0297]
In FIG. 48, icons “all routes”, “guidance start”, and the like are displayed at the interval HC12 at the bottom of the second screen. A road map or the like may be displayed on the background of the icon of the interval HC12, or map information may not be displayed on the background of this area. Further, the area where the return route is displayed is not limited to an area which is about 5% smaller than the effective display area of the second screen. That is, the area may be 5 percent or more smaller than the effective display region, or may be 1 to 5 percent smaller.
[0298]
When the map scale is obtained in step ST10 of FIG. 36, a map including the return route is displayed on the second screen so that the own vehicle is centered on the screen at the obtained scale (step ST12). Here, the return route itself is not specified again. Thereafter, the flow is returned to FIG. That is, the third screen display process or the like is performed.
[0299]
In the above embodiment, when the return route PC12 is displayed on the second screen, the original route portion connecting the nodes P28 and 24 adjacent to the node P12, which is the junction, is also displayed at the same time. However, the return route PC12 may be displayed on the second screen so that only the node P12 that is the junction is included. Furthermore, a map in a range that completely includes the entire return route from the node P22 to the separation point P12 to the junction point P12 may be displayed on the second screen.
[0300]
21. Second Example of “Initial Display of Second Screen”
FIG. 37 shows a flowchart of the second embodiment of “initial display of second screen” in FIG. In the second embodiment of the “initial display of the second screen”, the return route is not necessarily displayed so that the current position of the host vehicle is necessarily the center of the screen. That is, the map of the range including the whole return route obtained | required initially is displayed equally on the 2nd screen, and the state is hold | maintained. Therefore, the host vehicle is displayed so as to move on the map displayed on the second screen.
[0301]
First, the node coordinate value of each road constituting the return route is read (step SU2). The maximum value (Emax, Nmax) and minimum value (Emin, Nmin) in the east longitude direction and the north latitude direction are retrieved from the coordinate values of each node read out in step SU2 and the current position coordinate value of the host vehicle (step SU4). ). This process is the same as step ST4 in FIG. In this embodiment, the return route is composed of the route PC11 and the route PC12. When a map including the return route is displayed on the second screen, a part of the original route between the nodes P28 to P24 (FIG. 47) is also displayed at the same time.
[0302]
The original route between the nodes P28 to P24 is not displayed, and a map of a range including only the route PC12 from the node P12 at the junction point to the node P22 at the separation point or the current position P10 of the host vehicle is displayed. Also good. Further, as in the “initial display of the second screen” in the first embodiment, a map of a range including the original route from the node P26 to the node P24 and the entire return route is displayed on the second screen. Also good. In the following description, a case where the original route between the nodes P28 to P24 and the return route from the separation point node P22 to the junction point node P12 are displayed on the second screen will be described.
[0303]
For example, in the return route (route PC11 and route PC12) in FIG. 47, the node having the maximum coordinate value in the east longitude direction is the node P24. Therefore, the east longitude coordinate value of the node P24 is stored in the RAM 5 as the maximum value Emax. Similarly, the node having the maximum coordinate value in the north latitude direction is the node P12. Therefore, the north latitude coordinate value of the node P12 is stored in the RAM 5 as the maximum value Nmax.
[0304]
The node having the minimum coordinate value in the east longitude direction is the node P14 (or node P22). Therefore, the east longitude coordinate value of the node P14 is stored in the RAM 5 as the minimum value Emin. The node having the minimum coordinate value in the north latitude direction is the node P16. Therefore, the north latitude coordinate value of the node P16 is stored in the RAM 5 as the minimum value Nmin.
[0305]
Then, the following mathematical formula is calculated from the maximum value and the minimum value in each east longitude and north latitude direction (step SU6).
[0306]
Emax−Emin = XE (7)
Nmax−Nmin = YN (8)
Then, a map scale capable of displaying the east longitude interval XE and the north latitude interval YN is obtained using a numerical value calculation table recorded in advance in the information storage unit 37 (step SU8). As with the “initial display of the second screen” in the first embodiment, a map scale in which the east longitude interval XE is within the horizontal width HC4 and the north latitude interval YN is within the vertical height HC10 in FIG. Desired.
[0307]
In this numerical calculation table, when each east longitude interval XE and north latitude interval YN are given, the return route and the original are correctly displayed in the display area of the second screen surrounded by the horizontal width HC4 and the vertical height HC10. Stores a scale value that can display part of the route. That is, the scale value corresponding to each east longitude interval XE and north latitude interval YN is stored in the numerical value calculation table. The map scale value may be obtained directly by calculation. For example, when a map is displayed on the second screen at an arbitrary scale, the displayed geographical distance, that is, the distance in the east longitude direction and the distance in the north latitude direction can be known from the actual size of the second screen. Therefore, a map scale that can correctly display the specific east longitude interval XE and north latitude interval YN on the second screen can be calculated by a proportional expression. The numerical value calculation table stores the correspondence between the east longitude interval XE and the north latitude interval YN and the map scale.
[0308]
The area surrounded by the horizontal width HC4 and the vertical height HC10 is made about 5% smaller than the effective display area, as in the “initial display of the second screen” in the first embodiment. When the map scale is obtained in step SU8, a map of the range including the return route is obtained at the obtained scale so that the east longitude coordinates (Emin + XE / 2) and the north latitude coordinates (Nmin + YN / 2) are the center of the screen. It is displayed on the second screen (step SU10). Thereafter, the flow is returned to FIG. In the second embodiment, the map including the return route is displayed in the north up state.
[0309]
FIG. 41 shows the state of the display 33 immediately after the host vehicle has left the guide route. That is, on the second screen 108, the original route 146 and the symbol 100 representing the current position of the host vehicle are displayed. However, the searched return route itself is not yet displayed, and route guidance based on the return route is not performed. Icons 252 and 255 are also displayed at the same time. The icon 252 represents a switch that instructs the start of the all-route re-search process in FIG. An icon 255 represents a switch for instructing start of guidance based on the return route. Icons 250 and 256 are switches for manually changing the map scale of the third screen.
[0310]
FIG. 42 shows a state where the return route 258 is displayed on the second screen. FIG. 42 shows the state of the display 33 when the guidance start key (icon 255) is pressed in the display state of FIG. That is, the return route is clearly shown as a dotted line 258 from the state where the return route is not displayed as shown in FIG. In the actual display screen, the return route is displayed in a different color from the original guide route 146 or in the same color. 41 and 42, the purpose of the guide route next to the departure point side node next to the separation point (intersection 261 in FIG. 42) and the junction point (intersection 259 in FIG. 42). The original guidance route connecting the ground side node is also displayed.
[0311]
FIG. 43 shows a case where the host vehicle is further distant from the guide route in the display state of FIG. That is, in the state of FIG. 41, the return route is searched once. Thereafter, when the host vehicle deviates from the return route again, a new return route is searched for by the processing of steps SR2 and SR4 in FIG. Then, a road map including this new return route is displayed on the second screen 108. However, also in FIG. 43, since the guidance start key is not pressed, the return route is not clearly shown, and route guidance based on the return route is not performed. When the guidance start key is pressed in the state of FIG. 43, the return route is clearly shown as a dotted line 260 as shown in FIG.
[0312]
FIG. 44 shows how the return route is clearly indicated by a dotted line 260 on the second screen. FIG. 44 shows the state of the display 33 when the guidance start key (icon 255) is pressed in the display state of FIG. That is, the return route is clearly shown as a dotted line 260 from the state where the return route is not displayed as shown in FIG. In the actual display screen, the return route is displayed in a different color from the original guide route 146 or in the same color.
[0313]
FIG. 45 shows a display application example of the return route 260. That is, when the guidance start key is pressed, only the return route 260 connecting the current position of the host vehicle (the position of the symbol 100) to the junction 263 and the guide route 146 from the junction 263 to the destination are displayed on the second screen. Explicitly specified. Therefore, an unnecessary part of the guide route, that is, a part that has already traveled is not displayed on the second screen.
[0314]
22. First Example of “Display Adjustment of Second Screen” (Step SQ22 in FIG. 34)
FIG. 38 shows a flowchart of the display adjustment (step SQ22) of the second screen in the sixth embodiment (FIG. 34) of the present invention. In the “second screen display adjustment” of FIG. 38, the return route display position adjustment of the second screen and the like accompanying the traveling of the host vehicle is performed. That is, when the host vehicle travels along the return route, the return route from the current position of the host vehicle to the merge point, the guide route near the merge point, and the like are displayed at the maximum on the second screen. Note that in the “second screen display adjustment” in FIG. 38, a road map including a return route is displayed with the host vehicle at the center of the screen.
[0315]
First, the remaining route of the return route, that is, the data of each road constituting the untraveled route is read from the information storage unit 37. Then, each node coordinate value of the read road data is read from the node data file F3 or the like (step SV2). The maximum value (Emax, Nmax) and minimum value (Emin, Nmin) in the east longitude direction and the north latitude direction are retrieved from the coordinate values of each node read out in step SV2 (step SV4).
[0316]
The process of step SV4 is the same as step ST4 of FIG. Then, the following formula is calculated from the current position coordinates (GX, GY) of the host vehicle, the maximum values (Emax, Nmax), and the minimum values (Emin, Nmin).
[0317]
｜ GX −Emax | (9)
| GX -Emin | (10)
In equations (9) and (10), the absolute value of the calculation result is obtained. Then, the larger one of the values of the expressions (9) and (10) is stored in the RAM 5 as the east longitude width WE (step SV6).
[0318]
Further, the following formula is calculated.
[0319]
| GY -Nmax | (11)
| GY -Nmin | (12)
In equations (11) and (12), the absolute value of the calculation result is obtained. Then, the larger one of the values of the equations (11) and (12) is stored in the RAM 5 as the north latitude width WN (step SV8).
[0320]
Further, the scale KAP of the map currently displayed on the second screen is identified (step SV10). Then, the geographical distance RE in the east longitude direction and the geographical distance RN in the north latitude direction that can be displayed by the identified scale KAP are obtained (step SV12). The distances RE and RN may be a numerical value calculation table stored in the information storage unit 37 or the ROM 4 or may be obtained by an arithmetic expression such as a proportional expression. The numerical value calculation table here is the same as the numerical value calculation table described in the above “initial display of the second screen”. That is, when a map is displayed on the second screen at each map scale, the displayable geographical distances in the vertical and horizontal directions on the second screen are stored in correspondence with the map scale. Then, using the numerical value calculation table, the distances RE and RN are obtained (step SV12).
[0321]
Next, the size comparison between the east longitude width WE and the distance RE and the size comparison between the north latitude width WN and the distance RN are performed. If the east longitude width WE is greater than or equal to the distance RE or the north latitude width WN is greater than or equal to the distance RN, the scale KAP is changed to a value that can display a map of a wider geographic range (step SV16). That is, when the remaining route of the return route cannot be displayed on the second screen due to the movement of the host vehicle, the process of step SV16 is executed.
[0322]
However, if the east longitude width WE is shorter than the distance RE and the north latitude width WN is shorter than the distance RN, it is determined whether or not the east longitude width WE and the north latitude width WN are the scale KAP that can be appropriately displayed (step SV18). ). That is, it is determined whether the east longitude width WE is considerably shorter than the distance RE, or whether the north latitude width WN is not much shorter than the distance RN. The east longitude width WE << distance RE or the north latitude width WN << distance RN indicates that the geographic range of the return route to be displayed on the second screen has become narrower as the vehicle moves. In this case, the scale KAP value is changed to a scale value that allows the map to display a narrower geographical range (step SV20). That is, the map scale is changed to display the detailed map.
[0323]
When the scale KAP is adjusted in steps SV16 and SV20, the determination processing in steps SV14 and SV18 is executed again. That is, the scale KAP value is increased or decreased so that the east longitude width WE and the north latitude width WN can be displayed most appropriately. When the appropriate scale KAP is obtained in steps SV14 and SV18, the remaining route of the return route is displayed on the second screen with the own vehicle as the center of the screen (step SV22). Thereafter, the process returns to the guidance / display process of FIG. As described above, when the host vehicle travels after the guidance start by the return route is selected, the remaining portion of the return route to the junction is reduced. Therefore, in the first example of “display adjustment of the second screen”, the map scale is adjusted in accordance with the remaining portion of the return route that decreases. For example, when the remaining part of the return route is shortened and the geographical range to be displayed is narrowed, the display map scale of the second screen is reduced. As a result, a more detailed map is displayed on the second screen.
[0324]
The map scale KAP may be obtained using a table recorded in advance in the information storage unit 37. That is, on the second screen, the scale KAP in which the own vehicle is the center of the screen and the remaining return route is efficiently displayed on the map is obtained using a numerical calculation table or the like stored in the information storage unit 37 or the like. It may be sought directly. Note that the scale KAP is a value that allows the remaining return route or the like to be properly displayed in an area that is slightly smaller in area than the effective display area of the second screen. This is the same as the “initial display of the second screen” process of FIGS.
[0325]
23. Second Example of “Display Adjustment of Second Screen” (Step SQ22 in FIG. 34)
FIG. 39 shows a flowchart of the second embodiment of “display adjustment of the second screen”. The second embodiment of “display adjustment of second screen” corresponds to “initial display of second screen” of FIG. That is, a map scale that efficiently displays the remaining part of the return route that decreases as the host vehicle travels on the second screen is obtained as needed. In FIG. 39, first, the non-traveling road data from the current position of the host vehicle to the joining point of the return route is read from the information storage unit 37. The remaining return route and the node coordinate value of each road constituting the route near the junction of the original guide route are read from the node data file F3 or the like (step SW2). The maximum value (Emax, Nmax) and minimum value (Emin, Nmin) in the east longitude direction and the north latitude direction are retrieved from the coordinate values of each node read out in step SW2 and the current position coordinate value of the host vehicle (step SW4). ). This process is the same as step SU4 in FIG.
[0326]
Then, the following formula is calculated from the maximum value and minimum value of each east longitude and north latitude direction (step SW6).
[0327]
Emax−Emin = XE (13)
Nmax−Nmin = YN (14)
Then, a map scale capable of displaying the horizontal distance XE and the vertical distance YN is obtained using a numerical value calculation table recorded in the information storage unit 37 in advance (step SW8). That is, a scale is required for properly displaying the remaining part of the return route on the second screen. The calculation of the appropriate scale is performed in the same manner as “initial display of the second screen” in FIG. In this embodiment, the map displayed on the second screen is fixed, and the vehicle is displayed so as to move on the return route on the display map. However, the scale of the map may change as the vehicle moves.
[0328]
When the map scale is obtained in step SW8, the return route that has not traveled and the junction point so that the east longitude coordinate (Emin + XE / 2) and the north latitude coordinate (Nmin + YN / 2) are the center of the screen at the obtained scale. A part of the original guide route centered on is displayed on the second screen (step SU10). Then, the flow is returned to FIG. Note that the “second screen display adjustment” of the present embodiment is performed when the return route displayed on the second screen is displayed by the “initial display of the second screen” of FIG. 27, step SQ22 of FIG. As done. In addition, when the map including the return route is displayed by the process of “initial display of the second screen” in FIG. 37, the “second screen display adjustment” in FIG. 39 may not be performed. That is, the map including the return route and the like displayed first on the second screen is displayed at a fixed scale, and the map scale may not be adjusted with the movement of the host vehicle.
[0329]
FIG. 46 shows an application example of the second screen display. For example, the return route is displayed with an arrow 268. Further, when the return route is not displayed on the second screen, only the junction where the return route and the original route intersect may be clearly indicated by the mark 262. Further, even when the return route is clearly indicated, the junction point may be displayed by the mark 262. Further, the direction of the destination in the original guidance route may be displayed by the destination direction mark 264.
[0330]
The display process of the destination direction mark 264 will be briefly described. The intersection of the original guide route displayed on the second screen and the end of the map screen displayed on the second screen 108 of the display 33 is calculated. In this process, road data included in the range of coordinates displayed on the display 33 by the image processor 9 is read from each road constituting the guide route data MW. Then, the road closest to the registered destination TP is obtained from the road data. The guide route data MW is configured by sequentially arranging road number data connecting between the guide start point and the registered destination. Therefore, the road number with the largest order (address number) is the road closest to the registered destination.
[0331]
Furthermore, the nodes within the coordinate range displayed on the display 33 are read out from the nodes constituting the road. Among these nodes, the node ND1 having the largest order (address number) is selected. The coordinate data of the point where the straight line connecting this node ND1 and the node ND2 of the next address number intersects the screen edge of the display 33 is obtained. The obtained coordinate data is stored in the RAM 4 as the intersection data CP.
[0332]
Next, a process for obtaining the destination direction of the guidance route displayed on the display 33 is performed. For example, the inclination angle (Tanθ1) with respect to the absolute azimuth of a straight line connecting the coordinates of the intersection data CP (or the coordinates of the node ND1) and the coordinates of the node ND2 is the destination direction.
[0333]
Next, a process of displaying a destination direction mark 264 indicating the destination direction at the calculated intersection point CP is performed. This process is executed as follows, for example. The information storage unit 37 or the ROM 4 stores arrow character pattern data used for the destination direction mark. Then, according to the intersection data CP, the arrow character pattern is rotated so as to be an arrow indicating the destination direction. This character pattern data is sent to the image processor 9 and incorporated in the image data. As a result, the destination direction mark 264 is displayed at the coordinates indicated by the intersection data CP. Actually, the coordinates of the destination direction mark have a deviation from the intersection data CP so that the tip of the arrow coincides with the coordinates of the intersection data CP.
[0334]
As described above, in the sixth embodiment of the guidance / display process, when the host vehicle deviates from the guidance route, a return route for returning to the guidance route is once searched. Then, a road map in the vicinity of the host vehicle is displayed on the second screen at a scale at which the return route and the like are appropriately displayed. Then, guidance processing to the original guidance route using the return route is performed by the operator's selection. Further, in this return route guidance processing, two-screen display or one-screen display is made according to the selection of the operator. If the return route does not meet the operator's request, an all route search is performed in which a guide route to the destination is newly searched according to the operator's command. That is, the guide route can be selected according to the travel position of the host vehicle.
[0335]
It should be noted that operations such as guidance start, return route search, and route determination in each of the above-described embodiments can be performed only when the vehicle is traveling at a stop speed or lower speed.
[0336]
As described above, according to the present embodiment, the road map including the original guide route and the vicinity of the host vehicle is divided even if the host vehicle is temporarily deviated from the guide route due to the operator's intention. Is displayed on one screen of the displayed display 33. Moreover, the road map in the vicinity of the host vehicle is displayed at an appropriate scale when the return route from the point deviating from the original route to the junction with the original route is displayed. This return route is a recommended route that is automatically searched by the navigation device, from the current position of the host vehicle or a point that deviates from the original route to the recommended junction point of the original guide route.
[0337]
Thereby, even if the host vehicle is intentionally removed from the guide route, necessary map information such as the positional relationship between the current position of the host vehicle and the original guide route can be quickly confirmed. In addition, when guidance start is instructed, guidance processing for returning to the original route is started together with the display of the return route. Therefore, even if a temporary route deviation occurs due to an emergency or the like during traveling on the guide route, it is possible to quickly return to the guide route.
[0338]
Further, since the map displayed before the division is displayed at the same scale on the other screen of the divided screen, it is possible to prevent the situation confusion associated with the switching of the map display. That is, when the map displayed on the display 33 is changed, it usually takes more time to grasp the current position of the displayed vehicle and the map information, and the concentration of consciousness on the screen is generated. The As a result, lack of consciousness ahead of the vehicle may occur. However, in the present embodiment, since the map displayed before the division is displayed as it is on the other screen after the division, it is possible to prevent such a concentration of consciousness on the screen.
[0339]
Furthermore, when a map around the current position of the host vehicle is displayed on a conventional single screen, the guide route may disappear completely from the screen depending on the display scale. That is, when the detailed map is displayed on the screen before the division, the state where the guide route disappears from the screen occurs as the own vehicle moves away from the guide route. In this case, the direction of the original guide route with respect to the current position of the host vehicle is not known, and it is not possible to quickly return to the original route. In such a case, even if the guide route from the current position of the host vehicle to the destination is searched again, the new guide route takes more time to arrive at the destination and returns to the original guide route. It may be preferable to do so. However, according to the present embodiment, since the deviated original route and the relative position with the own vehicle are accurately displayed on one of the divided screens, the position and direction of the original guide route with respect to the current position of the own vehicle are determined. It can be accurately grasped. That is, it is possible to easily compare conditions when returning to the original route and using a new guide route.
[0340]
In addition, in the said 6th Example, it does not specifically limit about the kind of map displayed on the 2nd screen of a split screen. That is, it may be a road map or a residential map. The housing map is a road map including facility information such as housing. Furthermore, in the sixth embodiment, the map scale of the second screen is determined so that the entire return route is displayed to the maximum, but a map scale larger than that may be used. That is, a wider map including the return route may be displayed on the second screen. Furthermore, in return route search, route search may be performed in consideration of information transmitted from the outside such as VICS information. That is, based on road congestion information or the like, the congestion road may not be selected as a return route.
[0341]
Furthermore, the travel route after the host vehicle deviates from the original route may be accumulated, and a map of a range including the travel route and the return route may be displayed on the second screen. That is, after an arbitrary time has elapsed after the host vehicle deviates from the original route, the host vehicle does not always travel on the return route searched immediately after deviating from the original route. Therefore, when it is detected that the host vehicle has deviated from the original route, changes in the current position of the host vehicle are sequentially stored in the RAM 5 as moving coordinates in the east longitude and north latitude directions. In addition, when the movement coordinates are stored, the maximum value coordinates and minimum value coordinates in the east longitude direction and the maximum value coordinates and minimum value coordinates in the north latitude direction are stored. That is, the geographical movement range of the host vehicle is stored as the maximum value and the minimum value in the east longitude and north latitude directions. Then, when a map including a return route or the like is displayed on the second screen, a map including a moving geographic range from a point off the original route to the current position of the host vehicle may be displayed.
[0342]
24. Nearest facility setting process
FIG. 49 shows a flowchart of the nearest facility setting process in the seventh embodiment of the present invention. This nearest facility setting process is executed in the destination setting process of FIG. 5 or other processes. In the nearest facility process, a search and selection process for a stop facility other than the final destination near the current position of the vehicle or in the guide route is performed. The drop-in facilities are as follows. For example, there are gas stations for refueling, restaurants for meals, banks, post offices, supermarkets for shopping. In other words, this is a facility other than the final destination, and various facilities for completing necessary tasks in daily life.
[0343]
When the nearest facility setting process shown in FIG. 49 is requested, first, a genre for specifying a stop-in facility is displayed on the display 33. Then, one genre is designated using the genre list. The facility corresponding to the designated genre is displayed on the map of the second screen. At this time, the third screen displays a list of sales item names that are the search facility narrowing-down conditions. A specific item name is designated from the sales item name list on the third screen.
[0344]
Then, the list of sales item names is displayed on the second screen. Furthermore, only the facilities corresponding to the sales item name are displayed on the map on the third screen. In this way, in order to designate a stop-in facility, a narrow category is designated in order from a large category. Moreover, the search result according to the designation is displayed on the split screen. In addition, the search result according to the category specified immediately before or the search condition is also displayed.
[0345]
FIG. 49 will be described. First, it is determined whether or not a request for genre selection has been made by the operator (step SX2). The genre selection request is input by pressing a character portion such as “stop-by location setting” of the icon displayed on the display 33. If there is no request for genre selection, the processing in FIG. 49 is terminated. Then, the flow is returned to the overall processing of FIG. However, if a genre selection request is input, a genre selection list is displayed on the screen of the display 33 (step SX4).
[0346]
FIG. 50 shows an example of a genre list displayed on the first screen 104 of the display 33. The names of genres (for example, convenience stores, family restaurants, gas stations, etc.) are displayed in the respective columns of the list 270 shown in FIG.
[0347]
When the genre list is displayed, it is determined whether one genre is selected from the genre list (step SX6). If the genre is not selected, that is, if the operation of the touch switch 34 is not performed for a certain time, the process of FIG. 49 is forcibly terminated (step SX6). Then, the process returns to the overall process of FIG. However, when a specific genre is designated, a facility corresponding to the designated genre existing within a predetermined distance from the current position of the host vehicle is searched from the facility data file F16 (step SX8). That is, only the facilities corresponding to the specified genre are searched from the facilities in the facility data file F16. Further, a geographical linear distance from the current position of the host vehicle is calculated from the east longitude coordinate SEO and the north latitude coordinate SNO of each found facility.
[0348]
The identification number of each facility whose calculated linear distance is within a predetermined distance is temporarily stored in the RAM 5 as the search facility number GBn. When the extraction of the facility corresponding to the selected genre is completed, the display screen division process of the display 33 is then executed (step SX10). Then, each facility extracted in step SX8 is displayed on the map on the second screen (step SX12). Furthermore, a list of sales item names and brand names is displayed on the third screen. For example, in the first screen shown in FIG. 50, if a gas station in the genre is selected, a list of brand names (sales product names) of the gas station, which is the sales item name, is displayed in the third screen as shown in FIG. It is displayed on the screen (step SX14). If a bank is designated as the genre, the name of each bank company is displayed in a list on the third screen by the process of step SX14. When a restaurant is specified, a type list such as Chinese, Japanese, or Western food may be displayed first before the store name of each restaurant is displayed in a list. In this case, superimposition of search conditions (step SX18 etc.) described later is repeated.
[0349]
FIG. 51 shows a state where the screen of the display 33 is divided. On the second screen 108, facilities corresponding to the genre designated on the first screen are extracted and displayed on a map centered on the own vehicle. In addition, on the third screen, a list 272 of brands (sales item names) of the gas station designated on the first screen is displayed.
[0350]
Next, it is determined whether there is a return request (step SX16). This return request is a process in which the information displayed on the display 33 is returned to the information content displayed immediately before. If it is determined in step SX16 that a return request has been input, the display returns to the genre list display in step SX4, that is, the first screen in FIG. When the return request is input, the following may be performed. That is, the genre list displayed on the first screen of FIG. 50 may be displayed on either the second screen or the third screen of FIG. The input of the return request is performed by pressing an icon displayed on the display 33.
[0351]
If there is no return request, it is determined using the list 272 displayed on the third screen whether or not the brand designation of the gas station, which is a sales item, has been performed (step SX18).
[0352]
Note that what is specified in step SX18 corresponds to the search condition used in the secondary search. By specifying this secondary search, the specific facility is narrowed down.
[0353]
When the brand (sales item) of the gas station is designated in step SX18, a list of brands (sales item name) of the gas station is displayed on the second screen (step SX20). Then, only the facilities that handle brands (sales items) of the designated gas station are displayed on the map on the third screen (step SX22). The second screen 108 of FIG. 52 displays the processing result of step SX20. Similarly, the third screen 110 of FIG. 52 shows the processing result of step SX22. On the second screen 108, a list 272 of the third screen shown in FIG. 51 is displayed. In the third screen 110 of FIG. 52, only the facilities 279 corresponding to the brands (sales items) 278 of the gas station in the list 272 are displayed on the map.
[0354]
Next, it is determined whether or not there is a return request (step SX24). This return request is a process in which the information displayed on the display 33 is returned to the information content displayed immediately before. If it is determined in step SX24 that a return request has been input, the process returns to step SX12. That is, when a return request is made in the display state of FIG. 52, the display state of FIG. 51 is restored.
[0355]
However, if there is no return request, it is determined whether or not a facility designation operation has been performed (step SX26). That is, it is determined whether or not a specific facility is designated using the display on the third screen shown in FIG. If a facility is specified, information such as the coordinate value of the specified facility is read from the information storage unit 37 and stored in the RAM 5 as a stop-in place DP (step SX28).
[0356]
On the other hand, if one facility is not designated using the display of the third screen 110 or the touch switch 34 is not operated for a predetermined time, a split screen cancellation process or the like is performed (step SX30). That is, the nearest facility setting process shown in FIG. 49 is forcibly terminated. As described above, even when the specific facility is designated, the split screen is canceled (step SX30).
[0357]
In this way, in the nearest facility setting process of FIG. 49, in the facility designation such as a stop-by place, the conditions for searching for the facility are narrowed down sequentially such as genre designation and brand (sales item) name designation. Moreover, when the search conditions are narrowed down, the facility that matches the conditions and the next search condition (sales item list, etc.) are displayed in parallel on the split screen of the display 33. Therefore, the change of the search condition and the search result accompanying the change of the condition can be immediately confirmed on the divided screen. Therefore, the facility designation operation regarding the stopover destination or the destination can be performed more quickly and accurately.
[0358]
In addition, when the brand (sales item) of the gas station is designated in step SX18 of FIG. 49, the following may be performed. That is, as shown in FIG. 73, all facilities corresponding to the genre selected in step SX12 may be displayed on the second screen 108 as a map. Here, all the gas stations in the specific area are displayed on the second screen. Further, only the stands that handle the specific brand (sales item) designated in step SX18 are displayed on the map of the third screen.
[0359]
In the above embodiment, the genre is specified as the first search condition. A brand (sales item) name was specified as the second search condition. However, the present invention is not limited to such a search condition. For example, a search condition for extracting only facilities within a predetermined distance from the searched guide route may be replaced with the second search condition, or may be a third search condition. Furthermore, processing similar to the nearest facility setting processing in FIG. 49 may be executed in destination setting or the like. That is, in specifying the destination, each facility may be specified by various selection conditions such as genre selection, chain store name selection, sales item selection, and the like. Further, the following facility extraction along the route (FIG. 53) and / or extraction based on the shortest straight distance between the guidance route and the facility (FIG. 54) may be added to the search conditions for each facility.
[0360]
25. Extract facilities along the route
FIG. 53 shows an extraction subroutine for facilities along the route. In this subroutine, the geographical shortest linear distance from the facility to the guide route is calculated from the retrieved geographical coordinate data of each facility (step SX32). Then, only the facilities whose shortest straight distance is within a predetermined value are extracted. This shortest straight line distance calculation subroutine is shown in FIG. The guide route means the guide route data MW obtained by the route search process in the overall process of FIG. FIG. 55 is a diagram illustrating the positional relationship between the detected facility and the guidance route. The route from the guidance start point ε to the destination α is the route obtained by the route search process (step SA4).
[0361]
In the process of extracting facilities along the route in FIG. 53, first, the shortest straight distance with respect to the guidance route of each facility is calculated (step SX32). Only facilities whose shortest straight distance is within about 150 m are extracted (step SX34). And it is calculated | required whether each facility extracted by this step SX34 exists in the right or left side with respect to the advancing direction of a guidance route (step SX36). FIG. 56 is a diagram for explaining the process of step SX36.
[0362]
In FIG. 56, coordinates (X1, Y1) represent the coordinates of the nodes of the guide route that are close to the facility existing at the target coordinates (Xb, Yb). The coordinates (X1, Y1) correspond to the node SAS1 of the guide route shown in FIG. Further, as shown in FIG. 55, the reference coordinates (X0, Y0) correspond to the coordinates of the node SAS2 of the guide route or the current position of the host vehicle. Therefore, the reference vector a = (ax, ay) connecting the coordinates (X1, Y1) and the reference coordinates (X0, Y0) corresponds to the branch 300 in FIG. The reference vector a is a = (ax, ay) = (X1−X0, Y1−Y0). As the coordinates (X1, Y1) and the reference coordinates (X0, Y0), a node having a coordinate closest to the target coordinates (Xb, Yb) of the facility is selected from road data constituting the guide route data MW.
[0363]
An orthogonal vector c = (− ax, ay) rotated 90 degrees counterclockwise with respect to the reference vector a is defined. Also, it is assumed that there is a spread of an angle θ between the target vector b connecting the reference coordinates (X0, Y0) and the facility target coordinates (Xb, Yb) and the orthogonal vector c. The target vector b is b = (Xb−X0, Yb−Y0).
[0364]
Such an inner product of the orthogonal vector c and the target vector b is defined as follows.
[0365]
c · b = | c | × | b | × cos θ
By the way, when −90 degrees <θ <90 degrees, 0 <cos θ <1. When <−180 degrees <θ <−90 degrees and 90 degrees <θ <180 degrees, −1 <cos θ <0. Therefore, if the value of the inner product of the vectors c and b is positive, the facility of interest is on the left side in the traveling direction on the guide route. Conversely, if the inner product value is negative, the facility is on the right side of the direction of travel. In this way, the relative left and right positions of each extraction facility with respect to the guidance route are determined by the plus or minus of the inner product of the vectors (step SX36).
[0366]
Therefore, if only the positive / negative of the inner product calculation result is determined, the left-right direction of the target can be easily determined. The determined left and right data RL is stored in the RAM 5. The reference coordinates (X0, Y0) shown in FIG. 56 are always the coordinates of the node closest to the departure point among the two nodes closest to the facility to be inspected in the guidance route (in the case of FIG. 55, the node SAS2). ). Conversely, the coordinates (X1, Y1) are the node coordinates on the side close to the destination (node SAS1 in FIG. 55). The orthogonal vector c may be rotated 90 degrees clockwise with respect to the reference vector a. The relative position of each facility with respect to the traveling direction of the guide route may be detected by the outer product (| a | × | b | × sinE) of the reference vector a and the target vector b. Here, sinE is an angle between the reference vector a and the target vector b, but the rotation angle in the clockwise direction with respect to the reference vector a is positive.
[0367]
Further, the direction of the reference vector a is any direction such as a traveling direction at the current position of the host vehicle, a direction from the host vehicle to the destination, north, south, east, west, or a direction set by the operator. May be. That is, it may be determined whether the position of each facility is on the left or right side with respect to the designated linear direction.
[0368]
When the left and right positions of each extracted facility with respect to the guidance route are detected in step SX36 in FIG. 53, the facility-destination distance Zn from each extracted facility to the destination is calculated (step SX38). The facility-destination distance Zn here is a distance along the guide route. That is, it means the distance along the route from the point PP1 shown in FIG. 55 to the destination α. Therefore, in the case of FIG. 55, the facility-destination distance Zn is obtained by adding the linear distances of the branches 364, 365, and 366 to the linear distance from the point PP1 to the node SAS1. Further, the shortest straight distance (the value obtained in step SX32 in FIG. 53) may be added to the facility-destination distance Zn.
[0369]
Then, based on the obtained facility-destination distance Zn, rearrangement of the extracted facility data is executed (step SX40). For example, each facility is arranged from the largest facility-destination distance Zn. The facility extraction condition may be determined by the facility-destination distance Zn. That is, by comparing the facility-destination distance Zn and the distance between the host vehicle and the destination, facilities that are more than a predetermined value away from the current position of the host vehicle or more than a predetermined value from the destination are excluded. Also good.
[0370]
26. Shortest straight line distance calculation
FIG. 54 shows a subroutine (step SX32) for calculating the shortest straight distance between the search facility in FIG. 53 and the guide route. FIG. 55 is a diagram for explaining the relative geographical position relationship between the facility along the guide route and the guide route. FIG. 57 is a diagram for explaining the calculation of the shortest straight line distance. As described above, the route from the guidance start point ε to the destination α shown in FIG. 55 is the route obtained by the route search process (step SA4 in FIG. 5).
[0371]
Also, the nodes SAS1 and SAS2 shown in FIG. 57 correspond to the nodes SAS1 and SAS2 shown in FIG. The geographical minimum straight line distance between the coordinates PP2 of one retrieved facility and the guide route is obtained as follows. In the guide route, the nodes SAS1 and SAS2 closest to the coordinate PP2 of this facility are selected (step SX42 in FIG. 54). In order to detect two nodes closest to the facility of interest among the nodes on the guide route, the following processing is executed. First, a linear distance between each node of the guide route and the coordinate PP2 is calculated. Among the calculated linear distances, a node having the minimum value and the next smallest linear distance is detected. These two nodes are the nodes closest to the guide route.
[0372]
Next, the coordinates of intermediate points JJ1, JJ2,... That divide the straight line connecting the two nodes SAS1, SAS2 into m equal parts are calculated from the geographical coordinates of the nodes SAS1, SAS2 (step SX44). The geographical straight line distances of the straight lines RR1, RR2,... That connect the respective intermediate points JJ1, JJ2,... And the coordinate PP2 of the facility of interest are calculated (step SX46).
[0373]
Next, as an initial value setting, the distance value of the straight line RR1 is set to the minimum value Rmin. Further, an initial value “2” is set in the condition variable NS (step SX48). This condition variable NS represents the number of each of the straight lines RR1, RR2,. The geographical distance of the NSth straight line RR (NS) designated by the condition variable NS is compared with the minimum value Rmin (step SX50). If the value of the straight line RR (NS) is smaller than the minimum value Rmin, the distance value of the straight line RR (NS) is set to the minimum value Rmin (step SX52). After this numerical value replacement, the condition variable NS is incremented by 1 (step SX54).
[0374]
However, if the minimum value Rmin is smaller than the distance value of the straight line RR (NS), the process of step SX52 is not performed, and only one increment of the condition variable NS (step SX54) is executed. Thereafter, it is determined whether or not the condition variable NS has become larger than the number of intermediate points dividing the nodes SAS1 and SAS2 at equal intervals (step SX56). If the determination in step SX56 is NO, the process from step SX50 is executed again. However, if the condition variable NS is larger than the number of intermediate points obtained by dividing the nodes SAS1 and SAS2 at equal intervals, the processing in steps SX50 to SX56 is ended.
[0375]
As a result of the processing in steps SX50 to SX56, a numerical value substantially equal to the shortest straight line distance from the coordinate PP2 of the facility of interest to the straight line connecting the nodes SAS1 and SAS2 is set as the minimum value Rmin. Therefore, the minimum value Rmin obtained by the above processing is set as the shortest facility-route distance Rmin between the facility and the guide route. This minimum value Rmin represents the distance of a perpendicular line from the target facility to a straight line connecting the nodes SAS1 and SAS2. The shortest straight line distance calculation process may be performed as follows. A straight line distance between the node SAS1 or the node SAS2 and the target facility is calculated. Furthermore, an angle between a straight line connecting the nodes SAS1 and SAS2 and a straight line connecting the nodes and the facilities is obtained. You may obtain | require using a trigonometric function from the angle between these two straight lines, and the linear distance between a node and a facility.
[0376]
Moreover, the following extraction conditions may be added according to the left and right positions with respect to the guide route obtained by the processing of FIG. That is, when there is a median in the center of the road, it is impossible to make a right turn except at an intersection. Therefore, facilities on the right hand side of the road portion where such a right / left turn cannot be made may be excluded. In this case, road condition extracting means for extracting the road environment of each road in the searched guide route is provided. Based on the road condition read by the road condition extraction unit, the facility exclusion unit determines whether to exclude the extracted facility by using the result of step SX36 in FIG. That is, in step SX36, it is determined which facility is on the left or right side along the guide route. Therefore, the above extraction process can be performed by comparing the road environment with the left and right positions of each facility.
[0377]
The processing by the road condition extraction means is performed as follows. That is, road attribute data, attention point data, and the like are read from the road data file F4 of each road. The road environment of the guide route closest to the extracted facility is determined using the read road attribute data and the like. That is, the facility exclusion means determines whether or not it is difficult to stop by the facility. As a result, it is possible to prevent a facility that is extremely difficult to drop in from being selected as a destination or a stop-off place.
[0378]
Furthermore, information transmitted from an external device such as VICS or ATIS may be taken in and used as an extraction condition for a stop-in facility. For example, when a parking lot around a destination is extracted as a stop-in facility or the like, the following is performed. By the external information sent by VICS, ATIS, etc., the full condition of each parking lot, the empty state, or the congestion situation of the road in the vicinity of the facility is added to the facility extraction condition. That is, an extraction condition based on information sent from the outside such as VISC or ATIS may be added at the time of setting a destination or stopover. Thereby, the selection of the facility adjacent to a full parking lot or a traffic jam (congested) road can be prevented. That is, the number of facility selection errors can be reduced. The start instruction for the nearest facility setting process and the destination setting process is such that the host vehicle cannot be executed when the vehicle is traveling at a certain speed or higher.
[0379]
As described above, when a place where the user wants to drop in occurs in the middle of the guide route to the initially set destination, the facility along the guide route is searched together with the distance considering the current position of the host vehicle. Therefore, the extraction condition of the stop-in facility becomes more accurate, and a more optimal facility can be selected. That is, it is generally difficult to drop in to a facility far away from the guide route. Therefore, it is preferable that information regarding facilities far away from such a guide route is not displayed on the display 33. Therefore, if the facilities along the route are extracted, it is possible to prevent such poorly displayed information from being displayed on the screen and to select an incorrect facility.
[0380]
Further, in the middle of the route from the current position of the host vehicle to the destination, even if there is no stop-in facility that matches the purpose, there may be the following state. That is, there is a facility that matches the purpose at a point where the guide route is slightly turned back to the departure side. Even in this case, according to the above-described embodiment, since the facility that has already passed through the guide route is also searched, such a facility can be selected.
[0381]
In addition, if there are multiple extracted stop-off facilities, if you narrow down the narrowing conditions (straight distance from the guide route) as described above, only the stop-in facilities that match the user's wishes will be displayed. The time required for the facility selection process is shortened.
[0382]
In the facility setting process, the facility may be searched for in the entire map information based on the guidance route, or the search may be performed only in a specific area described later. In the case of along the guide route, a user traveling on the route can stop at a desired facility without greatly departing from the route. In addition, if a facility within a desired range is selected and displayed from a reference point (current location, destination, cursor position, etc.), the requested information and the search result can be quickly and clearly shown to the user. Provided to. In addition, when the extraction results of facilities are displayed on the screen, if various information such as the distance and positional relationship between each facility and the guidance route or the distance between each facility and the destination is displayed at the same time, the desired information for the guidance route is displayed. The location of the facility can be clearly understood.
[0383]
27. Postal code selection data 50
In setting a stop-in facility or a destination, after a specific area is designated by an area designation number such as the following zip code, the facilities may be sequentially extracted within the designated area. 58 to 63 show the structures of various data recorded in the information storage unit 37. These data are used in the destination setting process of FIG. FIG. 58 shows the postal code selection data 50. The zip code data 50 includes a zip code RDN, a street list address LA, a size LD, a facility genre list address NA, a size ND, a representative point east longitude coordinate PEO, a representative point north latitude coordinate PNO, and an area shape data address EA. One area is specified by one zip code RDN. Various data relating to the specified area are sequentially recorded from the storage address of the information storage unit 37 designated by the street list address LA, the facility genre list address NA, and the like.
[0384]
For example, the storage start address where the street list is recorded and the memory size are specified by the street list address LA and the size LD. Similarly, the storage start address and the memory size in which the genre list to which each facility belongs are specified by the facility genre list address NA and the size ND. The genre includes stations, museums, golf courses, bookstores, pharmacies, restaurants, etc., public facilities of such facilities, transportation facilities, sports / leisure facilities, shopping facilities, etc., classification of destinations or stops, fields, Indicates the category, purpose, application, or business (business).
[0385]
The representative point east longitude coordinate PEO and the representative point north latitude coordinate PNO represent the approximate center of the area corresponding to the postal code RDN. When the map data in the information storage unit 37 is displayed on the display 33, the geographical coordinates specified by the representative point east longitude coordinate PEO and the representative point north latitude coordinate PNO are set to the approximate center of the display 33. As a result, the area corresponding to the designated postal code is displayed at the approximate center of the display 33. That is, the map data corresponding to the postal code area is displayed at the approximate center in the display 33 by the representative point east longitude coordinate PEO and the representative point north latitude coordinate PNO. Depending on the display scale, a part of the edge of the area may be cut.
[0386]
Data specifying the outer shape of the area specified by the postal code RDN is recorded from the storage start address of the information storage unit 37 specified by the area shape data address EA. Data is stored in a memory area specified by the size ED. That is, latitude data and longitude data (geographical coordinates) for plotting the outer edge of the area are recorded from the memory address of the information storage unit 37 specified by the address EA. One zip code area is specified in the map data of the information storage unit 37 by the latitude and longitude (geographic coordinates) of the plurality of places. If all the latitudes and longitudes are within the display 33, the designated postal code area is completely displayed on the display 33.
[0387]
In this way, the zip code selection data 50 of FIG. 58 includes the zip code RDN, street list address LA, facility genre list address NA, representative point east longitude coordinate PEO, representative point north latitude coordinate PNO, and area shape data address EA as one unit. Data group. Moreover, the postal code RDN is used as index data. Therefore, if the postal code RDN is designated, one area is specified in the map data of the information storage unit 37. The designated postal code (telephone number) area is displayed at substantially the center of the display output means (display 33) based on the representative point data of this area. In the area display, an optimal display scale may be selected based on the area shape data. That is, the scale may be adjusted so that the entire area is completely displayed on the display 33. Furthermore, in the above description, the postal code RDN is used for specifying the area, but it may be designated by a telephone number, a municipal administration district number, or a number determined independently.
[0388]
Further, a specific area having the representative point east longitude coordinates and the representative point north latitude coordinates may be selected by a part of the postal code and the telephone number (part of the upper digits). That is, by inputting a part of the postal code and the telephone number, an area corresponding to the input part of the postal code and the telephone number is designated. For example, when a two-digit “12” from the top of the three-digit postal code “123” is input, an area corresponding to the top “12” of the input postal code may be displayed. Further, similarly to the postal code and the telephone number, the area may be designated by a specific identification number for each area distinguished, classified, or classified according to a predetermined condition. For example, a number for each prefecture, city, town or village, a number for each state, a number for each time zone, or a number for each country of the European Community.
[0389]
Thus, after the area is designated by the postal code or the like, the nearest facility setting process of FIG. 49 may be performed. Further, after the area designation, the following street designation may be further performed, and thereafter, the nearest facility setting process of FIG. 49 may be performed.
[0390]
28. Street list data 55
FIG. 59 shows the data structure of the street list data 55. The street list data 55 is composed of group data of the number of streets SS (m). The list data 55 is recorded from the head address of the information storage unit 37 specified by the street list address LA. One street list data 55 includes a street name SSN, a display representative point east longitude coordinate SEO, a display representative point north latitude coordinate SNO, a shape data address SEA, and a size SED.
[0390]
The street name SSN represents, for example, the name of the mth street. The street name may include a national road name (national road number), a local road name (local road number), a highway name (highway number), and the like. The longitude and latitude (geographical coordinates) of the representative point of this street are represented by the display representative point east longitude coordinate SEO and the display representative point north latitude coordinate SNO. The representative point is a point in the middle of the street, but may be a start point, an end point, or an end point on the east, west, south, or north side of the street.
[0392]
The shape data address SEA designates the storage start address of the geographic coordinate data of each node constituting this street. The size SED designates the size of the memory size in which the street shape data is recorded. The street outline is determined by the geographic coordinate data of each node. Using these display representative point east longitude coordinate SEO, display representative point north latitude coordinate SNO, and geographic coordinate data of each node, a street graphic is displayed on the display 33.
[0393]
When one street extends over a plurality of zip code areas, the street list data 55 relating to the street is stored for each zip code area. However, since the partial shapes of the streets existing in each area are different, the display representative point east longitude coordinate SEO, the display representative point north latitude coordinate SNO, the shape data address SEA, and the size SED are different. That is, when one street straddles two areas, the streets existing in each area are different. Therefore, the display representative points of the streets in each area are also different. As a result, the display representative point east longitude coordinate SEO of the street in each area, the display representative point north latitude coordinate SNO, and the like are recorded as street data. Each street name SSN is the same.
[0394]
29. Facility genre list data 60
FIG. 60 shows the data structure of the facility genre list data 60. The facility genre list data 60 is composed of data groups having the number of facility genres NC (k). One facility genre list data 60 includes a facility genre name NM, a facility list address NLA, and a size SED. The facility genre name NM represents the name of the genre.
[0395]
From the memory start address designated by the facility list address NLA, the list data of facilities belonging to this genre is stored in the memory area designated by the size NLD. Therefore, the geographical coordinates of each facility belonging to the facility genre name NM and the facility-specific name are identified by the data read from the memory designated by the facility list address NLA and the size NLD.
[0396]
30. Street shape data 65
FIG. 61 shows the data structure of the street shape data 65. The street shape data 65 is composed of a data group having the number of nodes ES (t). One street shape data 65 includes east longitude coordinates EEO, north latitude coordinates ENO, address ENO, and street name SSN. The geographical position of the node in the map data in the information storage unit 37 is determined by the east longitude coordinate EEO and the north latitude coordinate ENO. The address ENO represents the address data of the address of this node. This address ENO is displayed along with the street (or node) when the street is displayed in the display 33. Thereby, each address along the street can be identified.
[0397]
31. Facility list data 70
FIG. 62 shows the data structure of the facility list data 70. The facility list data 70 is composed of data groups with the number of facilities IS (u). This facility list data 70 represents a plurality of facilities belonging to one genre of one facility genre list data 60 shown in FIG.
[0398]
One facility list data 70 includes a facility name IM, an east longitude coordinate IEO, a north latitude coordinate INO, and an address IB. The facility name IM is a unique name of the facility. The east longitude coordinate IEO and the north latitude coordinate INO indicate the longitude and latitude (geographic position) of this facility. The location of the facility on the map is specified by the east longitude coordinate IEO and the north latitude coordinate INO. The address IB represents the address of the address.
[0399]
The street name SSN is the name of the road that this facility is in contact with. However, if there is no adjacent road, the name of the nearest street is used. The street name SSN may be the name of the road that is the closest to the facility. Therefore, when a plurality of streets (or guidance target roads) exist around the facility, a plurality of street names SSN are stored in one facility data. The street name SSN is the same as the street name SSN of the street list data 55 shown in FIG. The guidance target road means a road used in the route search process.
[0400]
32. Area shape data 75
FIG. 63 shows the structure of the data string of the area shape data 75. The area shape data 75 specifies the outer edge of the postal code area on the map as described above. Therefore, the area range on the map is specified by the area shape data 75. The geographical position of the outer periphery of the geographical range of the area is specified by a plurality of nodes. One area shape data 75 includes longitude and latitude, that is, east longitude coordinate AEO and north latitude coordinate ANO. The node number data ANC (v) indicates the number of nodes. That is, the number of nodes that follow the outer periphery of the area is the node number data ANC (v).
[0401]
33. Destination setting process (step SA5)
64 to 65 show a flowchart of the destination setting process executed by the navigation device of the present invention. In FIG. 64, first, the screen of the display 33 is divided (step SX60). Then, a postal code input screen is displayed on the second screen (step SX62). An example of this zip code input screen is shown in the second screen 108 of FIG. Further, an image for item selection is displayed on the third screen 110 (step SX64).
[0402]
As shown in FIG. 68, the input number display field 402, the numbers 408 from 0 to 9, and the “END” character 410 for selecting that the number input is completed are displayed on the second screen 108. . In addition, a mouse cursor 406 that can freely move in the screen 108 is also displayed. When the mouse cursor 406 is moved onto each number 408 and the confirmation input key is pressed, the number is recognized by the navigation device. The confirmation input key is a key switch provided on the navigation device.
[0403]
Mouse cursor 406 may be moved with a small joystick. The confirmation input key may be substituted by a switching mechanism into which the joystick is pushed. In addition, the mouse cursor 406 may not be displayed on the third screen 110. In this case, each display item in the screen 110 is selected by driving the joystick up and down. Then, the display color is changed in the frame of the selected display item so that the selected state can be identified. Thereafter, the selection of the highlighted item is confirmed by pressing the confirmation input key.
[0404]
The numerical value input using the input screen of the second screen 108 in FIG. 68 is used as the postal code RDN. When the postal code RDN is input, the postal code selection data 50 (see FIG. 58) is retrieved from the information storage unit 37 based on the postal code RDN. That is, one zip code selection data that matches the input zip code RDN is read from the information storage unit 37 from the data group of the zip code selection data 50.
[0405]
On the other hand, the item selection screen (FIG. 68) of the third screen 110 includes, for example, a “representative point map display” character 418, a “street name input” character 420, a “facility name input” character 422, A character 424 "Destination setting by item" is displayed.
[0406]
When the mouse cursor 406 displayed on the screen of the display 33 is moved by the operator and then the enter key is pressed, the following processing is executed. The relative position of the mouse cursor 406 on the screens 108 and 110 at the time when the confirmation key is turned on is detected (step SX66). That is, the position of the mouse cursor 406 on the screen at the time when the enter key is pressed is identified by the CPU 2. Then, the information content displayed at the position of the mouse cursor 406 is selected. For example, it is assumed that the confirmation key is pressed while the mouse cursor 406 is displayed over the character 418 of “representative point map display”. In this case, the representative point map display process is selected.
[0407]
Next, it is determined whether or not “Destination setting by another item” has been selected (step SX68). When this “destination setting by another item” is selected, the processing in FIG. 64 is ended. That is, the process of setting the destination from the area specified by the zip code is cancelled. Therefore, if the decision result in the step SX68 is YES, a destination setting processing subroutine based on another item is executed (step SX70). In setting the destination based on another item, for example, there is a process of selecting the destination directly from the address of the destination. When the subroutine of step SX70 is completed, the process returns to the main flow of FIG.
[0408]
However, if the decision result in the step SX68 is NO, the processes after the step SX72 are executed. When any of the representative point map display process, the street name input process, or the facility name input process is selected in the item selection process in steps SX64 and SX66, the selection result is stored in the RAM 5 as the mode set data MD.
[0409]
If “Destination setting by another item” is not selected and other processing, for example, “representative map display” is specified, the item selection image that has been displayed on the third screen until then is displayed on the second screen. (Step SX72). Thereafter, the mode selected on the third screen in FIG. 68 is determined. That is, it is determined whether or not the mode for displaying the representative point map has been selected based on the data of the mode set data MD (step SX74). If selected, the “representative point map display and destination setting” subroutine is executed (step SX76).
[0410]
However, if the representative point map mode is not selected or the processing of “representative point map display and destination setting” in step SX76 is completed, the determination in the next step SX78 is executed. That is, it is determined whether or not the mode selection is the street input mode (step SX78). If the street input mode is selected, the “street name display and destination setting” subroutine is executed (step SX80).
[0411]
Then, when the “street name display and destination setting” subroutine is completed or when the determination result of step SX78 is “NO”, the determination of step SX82 is executed. That is, it is determined whether or not the genre setting mode has been selected (step SX82). In the genre setting mode, the “genre list display and destination setting” subroutine is executed (step SX84). If the subroutine of step SX84 is completed or if the result of step SX82 is “NO”, it is determined whether the return key has been pressed (step SX86). If the return key is pressed, the processing after step SX62 is executed again. That is, an image for inputting a zip code is displayed on the second screen. However, if the return key is not pressed, the process returns to the main flow of FIG. That is, if the return key is pressed, the display state of the display 33 is returned to the previous state.
[0412]
34. Representative point map display and destination setting subroutine
FIG. 65 shows a representative point map display and destination setting subroutine. First, the postal code selection data 50 designated by the postal code RDN is read from the information storage unit 37. This zip code RDN is input in step SX62 in FIG. Further, the area shape data address EA and the size ED recorded in the zip code selection data 50 are extracted.
[0413]
From the memory area specified by the area shape data address EA and the size ED, the east longitude coordinate AEO and the north latitude coordinate ANO (see FIG. 63) of each node defining the outer edge (outer periphery) of the area are sequentially read. Then, the maximum value and the minimum value are extracted in the east longitude coordinate AEO of each node (step SX90). Similarly, the maximum value and the minimum value in the north latitude coordinate ANO of each node are extracted.
[0414]
The scale for displaying the map on the display 33 is obtained from the maximum value and the minimum value of each east longitude coordinate AEO and each north latitude coordinate ANO (step SX92). For example, the geographical distance in the east longitude direction is calculated from the maximum value and minimum value of east longitude. Similarly, the geographical distance in the north latitude direction is calculated from the maximum and minimum values of north latitude. Further, the geographical distance in the east longitude and the north latitude direction that can be displayed on the divided screen of the display 33 at an arbitrary scale can be known from the actual size of the screen. Therefore, the scale for displaying the east longitude and the north latitude direction of the designated area can be calculated backward from the geographical distance that can be displayed on the screen. When the scale is obtained in this way, the designated area is completely displayed in the divided screen.
[0415]
That is, the whole area is displayed in the third screen 110 of the display 33 without cutting the end of the area designated by the postal code RDN (step SX94). The geographic range of the designated area of the postal code RDN is determined by the area shape data 75. The map data displayed on the display 33 is stored in the information storage unit 37.
[0416]
A display example of the designated area based on the appropriate scale is shown in FIG. In FIG. 69, the designated area is a range surrounded by a dotted line 456. Also, the turning points 460, 462, etc. shown in FIG. 69 represent nodes. Furthermore, the symbol 452 represents the current position of the host vehicle. Curves 458 and 459 represent roads. In step SX94, the shapes of all streets or main streets in the designated area are displayed simultaneously. In this case, the street shape data 65 of each area in FIG. 61 is used.
[0417]
Note that the appropriate scale selection process in step SX92 may be omitted, or the scale may be selected manually by the operator. Further, a wider range map including the area designated by the postal code RDN may be displayed on the third screen 110. That is, the map (wide area map) may be displayed at a larger scale than the appropriate scale that can effectively display the designated area on the third screen. When the process of step SX92 is omitted, the area map displayed on the display 33 is set so as to be displayed in the most enlarged manner. In addition, the representative point east longitude coordinate PEO and the representative point north latitude coordinate PNO (see FIG. 58) of the designated area are set as the center of the third screen 110.
[0418]
In this way, when the area map is displayed in the third screen 110 of the display 33, each facility is further displayed in the designated area by using the graphic symbol stored in the flash memory 3 or the like (step). SX96). In the facility display, facility list data 70 in FIG. 62 is used. A specific symbol is displayed at the geographic coordinates of each facility. This symbol is, for example, a star, a circle, a triangle, a square, a fork, a cup, a bag, a flag, a house, or the like. The facility display may be performed only when the most enlarged area map is displayed on the third screen of the display 33.
[0419]
Thereafter, an arbitrary point in the display map area is designated using the mouse cursor 406 displayed in the display 33. That is, the mouse cursor 406 is moved by the operation of the operator, and the confirmation key is pressed. The display position of the mouse cursor 406 at the time when the confirmation key is pressed is the destination desired by the operator. Therefore, the display position of the mouse cursor 406 at the time when the enter key is pressed is acquired (step SX98). From this cursor display position, the actual geographical coordinate position is calculated by calculation using a map scale or the like. The geographical coordinate position obtained by this calculation is stored in the RAM 5 as registered destination data TP (step SX100).
[0420]
When the process of step SX100 is completed, the process returns to the destination setting process of FIG. The stopover location may be set according to the same procedure as described above. When the stop location is set by the same processing as that of FIG. 64, the geographical coordinates of the stop location are stored in the RAM 5 as the stop location DP.
[0421]
35. Street name display and destination setting subroutine
FIG. 66 shows a street name display and destination setting subroutine. The process of FIG. 66 is executed when the determination result of step SX78 is YES in FIG. In FIG. 66, all the streets in the area designated by the postal code RDN are first read (step SX110). The listing of all streets is performed using the street list data 55 of FIG. In the street list data 55, street names in the area designated by the postal code RDN are stored. Therefore, by extracting only the street name from the street list data 55, street listing is performed.
[0422]
The list of street names listed in step SX110 is displayed on the third screen 110 of the display 33 (step SX112). When the number of streets SS (m) is large, all the streets cannot be displayed on the display 33 at once. In this case, the remaining street names are sequentially displayed by scrolling the screen of the display 33. A display example of the street list is shown in FIG. In addition to the street list display, each street name may be notified by voice.
[0423]
When the street list is displayed in step SX112, the mouse cursor 406 is also displayed on the screen 108 of the display 33. Then, the display position of the mouse cursor 406 at the time when the enter key is pressed is acquired (step SX114). The display position of the mouse cursor 406 identifies which street has been selected (step SX116).
[0424]
The display representative point east longitude coordinate SEO and the display representative point north latitude coordinate SNO of the street selected in step SX116 are read from the street list data 55 (step SX118). Further, the street shape data 65 of the selected street is read from the information storage unit 37. The street shape data 65 includes east longitude coordinates EEO and north latitude coordinates ENO of each node, and the shape of this street is determined. Therefore, the maximum value and the minimum value are detected from the east longitude coordinate EEO and the north latitude coordinate ENO of each node (step SX120).
[0425]
The detection of the maximum value and the minimum value of the node coordinates in the east longitude and the north latitude direction is the same processing as in step SX90 in the area map display described above. Therefore, the appropriate scale of the map displayed on the display 33 is obtained from the obtained maximum and minimum values in the east longitude and the north latitude direction. That is, a scale that can completely display the designated street on the divided screen is required. At this determined scale, the street is displayed on the third screen 110 of the display 33 (step SX122). When this street is displayed, each address associated with this street is displayed together. In addition to this street display, this street name may be notified by voice.
[0426]
Along with the street display on the third screen, a street list is displayed on the second screen (step SX123). An example of a street displayed on the third screen 110 of the display 33 is shown in FIG. As shown in this figure, the selected street is identified and displayed on the third screen 110 as another road. In FIG. 71, this is indicated by a thick line 500. The designated street may be displayed in a different color that can be identified from other roads. In addition, the name of the selected street is displayed as characters 504 in the display area 502 provided at the top of the third screen 110. Note that the street name SSN of the street list data 55 is used as the display street name. In FIG. 71, a character 506 represents an address. For this address display, the data of the address ENO in the street list data 55 is used.
[0427]
Calculation of the appropriate scale in step SX122 may be omitted. In this case, a map is displayed so that the street is expanded most, or a wider range map (wide area map) is displayed. In addition, adjustment is performed so that the representative point of the street is substantially at the center of the screen 100. The representative point of the street is determined by the display representative point east longitude coordinate SEO and the display representative point SNO in the street list data 55.
[0428]
Thus, when the identified street is displayed on the third screen 110, an arbitrary point along the street is designated as the destination by the mouse cursor 406. That is, the position of the mouse cursor 406 on the screen 110 at the time when the enter key is pressed is detected (step SX124). It is also determined whether or not the return key has been pressed (step SX125). If the return key is pressed, the display state of the display 33 is returned to the state before one process. That is, the process returns to step SX72 in FIG. If the return key is not pressed, the actual geographic coordinate position is calculated from the cursor display position at the time when the confirmation key is pressed. The geographical coordinate position obtained by this calculation is stored in the RAM 5 as registered destination data TP (step SX126).
[0429]
When the process of step SX126 is completed, the process returns to the destination setting process of FIG. The stopover location may be set according to the same procedure as described above. That is, the area is designated by the postal code RDN or the like. A specific street is selected from all streets in the specified area, and a specific point is specified on the displayed street map. This designated point is stored in the RAM 5 as a stop-in place DP.
[0430]
In this way, in the street name display and destination setting of FIG. 66, all streets in the designated area are listed. Then, one street where the destination exists is selected from the list of street names. A map representing the entire street is displayed on the screen of the selected street. Therefore, a specific point on the map representing this street is designated as the destination by the mouse cursor. As a result, the destination or stopover can be easily specified from the street name. Note that when the street is displayed in step SX122, the entire designated area including the street may be displayed.
[0431]
36. Genre list display and destination setting subroutine
FIG. 67 shows a genre list display and destination setting subroutine. In FIG. 67, first, the genre of each facility in the area designated by the postal code RDN is listed (step SX130). This genre listing is performed using the facility genre list data 60 of FIG. The memory area of the information storage unit 37 of the facility genre list data 60 is specified by the facility genre list address NA and the size ND of the zip code selection data 50.
[0432]
Next, the facility genre name NM of the facility genre number NC (k) is read from the facility genre list data 60. Then, the genre list is displayed on the third screen of the display 33 (step SX132). A screen display example of this genre list is shown in FIG. Thereafter, the display position of the mouse cursor 406 on the screen 110 at the time when the confirmation key is pressed is acquired (step SX134). That is, the genre name at the display position of the mouse cursor at the time when the enter key is pressed is set as the selected genre. It is also determined whether or not the return key has been pressed (step SX135). If the return key is pressed, the process returns from the process of FIG. 67 to step SX62 of FIG.
[0433]
If the return key has not been pressed, it is determined that the genre displayed at the position of the cursor 406 has been selected (step SX136). Facilities belonging to the specified genre are listed (step SX138). That is, facilities corresponding to the selected genre are listed using the facility list data 70 of FIG. The memory area of the facility list data 70 is designated by the facility list address NLA and the size NLD. The facility list address NLA and the size NLD are included in the facility genre list data 60. That is, when a genre is specified, a list of facilities that belong to the genre and are in the designated area is read from the information storage unit 37 immediately.
[0434]
Next, only the facility name IM of the facility list data 70 is extracted and displayed as a list on the third screen of the display 33 (step SX140). Further, the genre list is displayed on the second screen (step SX141). Then, the display position of the mouse cursor 406 on the screen 110 at the time when the confirmation key is pressed is acquired (step SX142). The facility at the display position of the cursor 106 is set as the destination (step SX144). That is, the selected facility is stored in the RAM 5 as the registered destination data TP.
[0435]
Further, it is determined whether or not the return key has been pressed (step SX145). If the return key has been pressed, the process returns to step SX72 in FIG. However, if the return key is not pressed, the processing after step SX146 is executed. That is, when the return key is pressed, the display state of the display 33 is returned to the previous display state.
[0436]
If the return key is not pressed, the east longitude coordinate IEO and the north latitude coordinate INO of the facility selected in step SX144 are read from the facility list data 70. Based on the east longitude coordinate IEO and the north latitude coordinate INO, a map around the designated facility is displayed on the third screen of the display 33 (step SX146). Moreover, the facility list is displayed on the second screen (step SX147). The scale of the map display may be the scale at which the map is displayed at the maximum or the scale selected by the operator. Furthermore, the facility name may be notified by voice together with the surrounding map display of the specified facility. Note that the processing of steps SX146 and SX147 may be omitted.
[0437]
After the display of step SX147 is performed, it is determined whether or not the return key has been pressed (step SX148). If the return key is pressed, the process of step SX140 is executed again. However, if the return key has not been pressed, the process returns to the destination setting process of FIG. In this way, in the genre list display and destination setting in FIG. 67, the genre is specified from the designated area. Then, a desired destination is designated from the specified genre list.
[0438]
As described above, in the destination setting process of this embodiment, after a specific area is designated by the zip code RDN, information displayed on the display 33 has a plurality of types (three types, three modes). Then, the destination is specified from a map or a list displayed in each mode. For example, a specific street is specified in the specified area. Since the designated street is displayed as a map, a specific point is designated as the destination on the street map. As described above, since the destination search is performed step by step through area designation, street designation, genre designation, etc., destination designation is easier. In each display state in the above embodiment, when the return key is pressed, the display is returned to the previous selection screen.
[0439]
37. Application example of the above destination or stopover setting process
The destination setting process may be performed as follows. First, a specific area is designated by a zip code. Next, a specific street is selected from all the streets in the area. Further, when a genre is designated, facilities that are around the selected street and that correspond to the designated genre are listed. Finally, a desired destination is selected from the listed facility names. As a result, the desired destination can be searched near the street and from a specific genre.
[0440]
Further, the destination setting process may be performed as follows. A specific area is specified by the zip code. Next, a specific street is selected from the streets in the area. In addition, the facilities along the selected street are listed. Finally, a desired destination is selected from the listed facility names. Therefore, a desired destination is extracted from a specific street along a specific area.
[0441]
Furthermore, the destination setting process may be performed as follows. First, a specific area is designated by the postal code RDN. Thereafter, a specific genre is selected. Next, street names where each facility corresponding to the specified same genre exists are listed. A facility is selected based on the street name list. Therefore, when setting the destination, it is possible to search in the order of region, genre, and street.
[0442]
The present invention is not limited to the above embodiments, and various modifications can be made without departing from the spirit of the present invention. For example, when the street is selected in step SX116 in FIG. 66, the street list is displayed in the display 33 as shown in FIG. 70, but this may be performed as follows. That is, as in the second screen 110 of FIG. 69, the area is displayed on the divided screen of the display 33, and each street name is also displayed on the screen. When an arbitrary geographical coordinate on the display area is selected by the mouse cursor 406, an enlarged view centering on the selected portion is immediately displayed. When the enlarged view is displayed, facilities in the displayable range of the display 33 are also displayed at the same time. Thereby, the operator can search each facility along the specific street in the specific area while looking at the map.
[0443]
In each of the above embodiments, the area is designated by the zip code. However, this zip code can be replaced with the entire telephone number or the upper part. In other words, an area can be specified using only the area code, or an area can be specified using the area code and the upper digits of the remaining telephone numbers excluding the area code. Note that the postal code to be input may be either the upper part or the whole.
[0444]
Further, after step SX94 or SX96, the process may be jumped to step SX110 or step SX130. Thereby, the list or figure of the street in the displayed area or the list or position of the facility is displayed and / or outputted as a sound. Further, the process of step SX94 may be executed in step SX112. Furthermore, instead of the facility list display in step SX140, the facility map display in step SX96 may be performed, or the facility location may be displayed on the map in conjunction with the facility list display. Thereby, the figure of the street in the designated area or the position of the facility in the designated area is displayed. Note that the order of step SX146 and step SX144 may be interchanged.
[0445]
Furthermore, the selection by the mouse cursor may be executed by voice from the operator. In this case, a desired item (genre, street name, facility name, etc.) is specified by being pronounced by the operator from the display output or / and audio output list.
[0446]
In each of the above embodiments, the destination or stopover search process based on the postal code RDN input is performed before the route search process (step SA4). However, the destination or stopover search process may be performed during the guidance / display process in step SA5. That is, in the middle of the guidance route, a new stop or destination is set according to the operator's request. However, these operations are performed when the host vehicle is stopped or slowing down. As a result, the destination or stop-by location can be easily changed. Furthermore, extraction by business hours of each facility may be performed for selection of a destination and a stop-in place. For example, a facility that is open from 11 am to 11 pm may be extracted.
[0447]
Furthermore, an address such as a prefecture name, a state name, and a city name may be used as a search condition for a destination or stopover. As the genre of the search condition, a field, a business type, a brand of a sale item, and a sale item may be used. Each facility may be classified or searched according to the price, performance, and performance of specific sales items in each store. That is, the various internal information representing the internal characteristics of the facility from which each facility is extracted may be any item such as a sales item. Internal information includes industry, brand, item, price, performance, performance, business hours, etc.
[0448]
Further, retrieval or extraction may be performed based on the number of floors, floor area, height, advertising body, color, site, section, planar shape, or three-dimensional shape, which are external information representing the external characteristics of the building. In addition, the destination and stop-off place correspond to ground or underground structures such as facilities and buildings, but in addition to this, a point where a detailed place name or address can be guided also corresponds. The current position of the host vehicle, which is the starting point for searching the guide route or the base point for displaying a map, includes a departure point or a start point where guidance can be started.
[0449]
In addition, the identification of the street in the area is superimposed on the facility extraction in the above embodiment. That is, although the facility in the vicinity of the specific street in the area is extracted, this may be performed as follows. For example, a well-known facility in a specific area, for example, a facility within a predetermined distance from each station such as a bus, a tram, and a subway may be extracted. Furthermore, prominent facilities include government buildings such as prefectures, municipalities, intersection names, and memorial facilities such as Tokyo Tower, Ueno Park, Imperial Palace, Castle, Mikasa and the like.
[0450]
In the destination or stopover setting process, facilities are extracted according to new search conditions for each search result. However, various search conditions for extracting the facility may be a combination of one or more search conditions. For example, when extracting facilities in an area, the extraction of facilities by genre and the like and the extraction of facilities along the street may be performed simultaneously.
[0451]
In the above-described embodiment, the search conditions and the extraction results based on the search conditions are sequentially displayed on the second screen and the third screen, respectively. For example, when the search condition is displayed on the second screen, the extraction result based on the previous search condition is displayed on the third screen. When the search condition is selected on the second screen, the search condition displayed on the second screen is displayed on the third screen, and a new search result is displayed on the second screen.
[0452]
That is, the latest information at the time of each operation is displayed on the second screen. Moreover, when a search condition selection operation is performed, the information on the second screen is moved to the third screen, and a new search result or the like is displayed on the second screen. However, this may be done as follows. That is, each search condition, for example, a selection list such as a genre or street, and the facility extraction result according to each search condition may be displayed on the second and third screens in any combination. For example, a search condition may be displayed on the third screen, and a past facility extraction result on which extraction based on the search condition is performed may be displayed on the second screen.
[0453]
Further, in the above-described embodiment, the screen division of the display 33 is performed by the operator's selection operation of the search condition, but may be performed by the following environmental change. For example, it may be performed simultaneously with a search processing start command, or may be performed when a search condition is input or when a search result based on the selected search condition is displayed. In addition, a split screen display request by the operator, a change in the running state of the own vehicle, a change in the speed of the own vehicle, a change in the direction of the own vehicle, a change in the altitude of the own vehicle, a change in the distance to the destination or stopover point, When the host vehicle departs from or enters the range of the house map recorded in the information storage unit 37, the destination is changed, the travel time changes, the rotational speed of the drive source (engine, motor) Or change in temperature of drive source, change in time, change in remaining amount of fuel, change in battery voltage or current, change in ambient environment (brightness (daytime, sunset, after sunset), Changes in temperature, humidity, wind pressure, precipitation (rainfall, snowfall, noise)).
[0454]
Similarly, the cancellation of the screen division may be performed by an operator switching operation, for example, selection of a search condition, at the end of search processing or display of search results. Furthermore, changes in the running state of the host vehicle, changes in the speed of the host vehicle, changes in the direction of the host vehicle, changes in the altitude of the host vehicle, changes in the distance to the destination or stopover, and are recorded in the information storage unit 37 When the host vehicle is out of or within the range of the house map, or when the destination is changed, the travel time changes, the speed of the drive source (engine, motor) or the temperature of the drive source changes, time Changes in the amount of fuel, changes in the remaining amount of fuel, changes in battery voltage or current, changes in the surrounding environment (brightness (daytime, sunset, after sunset), temperature, humidity, wind pressure, precipitation (Changes in rainfall, snowfall, noise)).
[0455]
As described above in detail, in the destination setting process of this embodiment, the screen is divided and the search condition and the search result are displayed in parallel on each divided screen. As a result, the search conditions for the destination can be narrowed down in stages, so that the destination can be searched more easily. In particular, even when the address or the like of the desired destination is not clearly known, the destination can be searched based on the number specifying the area.
[0456]
38. Application example of each example
In addition, in the above-described embodiments, the screen 33 of the display 33, the division cancellation (combining of screens), or the switching of the navigation operation are performed by the selection operation of the operator and the change of the current position of the own vehicle. The following environmental changes may be performed. For example, a change in the running state of the own vehicle, a change in the speed of the own vehicle, a change in the direction of the own vehicle, a change in the altitude of the own vehicle, a change in the distance to the destination or stopover, and the information stored in the information storage unit 37 When the host vehicle is out of or within the range of the house map, or when the destination is changed, the travel time changes, the speed of the drive source (engine, motor) or the temperature of the drive source changes, time Changes in the amount of fuel, changes in the remaining amount of fuel, changes in battery voltage or current, changes in the surrounding environment (brightness (daytime, sunset, after sunset), temperature, humidity, wind pressure, precipitation (Changes in rainfall, snowfall, noise)). Note that various sensors are required to change the environment. For example, an optical sensor including a photoelectric conversion element or the like is used to change light in the surrounding environment.
[0457]
The division position on the display screen of the display 33 is not particularly limited in the present invention. In each of the above embodiments, the screen of the display 33 is divided in the vertical direction, and the second screen and the third screen are divided to have an equal area. However, the display area of the second screen may be smaller than the display area of the third screen. Conversely, the display area of the second screen may be larger than the display area of the third screen. Further, when the display screen of the display 33 is vertically long, it may be divided in the horizontal direction, the third screen may be the upper screen, and the second screen may be the lower screen. In addition, the 3rd screen here means the screen which displays map information with higher necessity for a driver | operator. Furthermore, in each said Example, the screen was divided into 2, However, You may divide | segment into 3 or more screens. For example, the second screen in each of the above embodiments is divided in the horizontal direction, and is divided into an upper screen and a lower screen. Then, different geographical information may be displayed on each divided screen.
[0458]
Further, in each of the above embodiments, geographical information is displayed on each of the second screen and the third screen. This may be as follows. For example, a television image is displayed on the second screen. Map information or the like may be displayed on the third screen. In each of the embodiments described above, when the user instructs to cancel the screen division, one map is displayed on the entire screen of the display 33. When the division is canceled, the map displayed on the third screen may be displayed on the entire screen of the display 33.
[0459]
(1) In addition to the above, the screen may be divided into left / right, up / down, diagonally up / down, etc., and the display areas of both screens may be different. In this case, the image memory 10 is divided according to these division forms, and the addressing of each image memory element is also divided according to these division forms. Further, the number of divided screens may exceed two, and the number of divisions of the image memory 10 is increased accordingly, and the number of palette RAMs 204 and 208 in FIG. 18 is also increased.
[0460]
(2) In addition to the above (1), the information displayed on the third screen 110 (or the second screen 108) of FIG. 10 or FIG. 14 may be the simplified diagram of FIG. In this case, the processing of step SK16 or SK24 is executed in step SC8, SC20, SD12, SD14 or step SC6, SC18, SB18, SB22, SK8, SK12).
[0461]
In addition to the above, in step SK4, the operation of the touch switch on the icon displayed on the display 33 or the switch corresponding to this icon may be determined. This icon is “Map Orientation”.
[0462]
In addition to the above, in steps SB4, SB10, SE4, SE12, SG10, and SG4, the operation by the operator according to the icon may be determined. This icon is “division release” in step SB4, “screen division” in step SB10, “scale change” in steps SE4 and SG4, “route forward display” in step SE12, “all route display” in step SG10, and the like.
[0463]
In the screen division process of FIG. 8, the map displayed on each screen may be manually selected. In this case, when “details” displayed as an icon is selected, a split screen and a main line including a non-main road (a narrow street or a non-guide road) mainly from a full screen of only a main road (guide road). The screen is switched to a split screen only for roads (guide roads). Further, when “Summary” displayed as an icon is selected, the screen is switched from a full screen including non-main roads to a split screen including only main roads and a split screen including non-main roads.
[0464]
In addition, in step SD4 of the third screen process in FIG. 11, the display map mode may be manually selected. In this case, when the “intersection” displayed by the icon is selected, the screen is switched from the full screen of the road map to a split screen showing the left-right turn direction at the intersection or a turning point and the split screen of the road map. As described above, the display content before the screen division is displayed on one screen after the division, and the content to be displayed by the display switching is displayed on the other screen after the division.
[0465]
(3) In addition to the above (1) and (2), switching to the split display may be in accordance with a change in the direction of the vehicle. In this case, based on the information from the absolute direction sensor 21 or the relative direction sensor 22, if the direction of the own vehicle deviates from “north” by a predetermined angle (for example, ± 45 degrees, ± 30 degrees), the above steps SK12 → SK14 →. , Step SK8 → SK10 →..., Step SK20 → SK24 →..., Step SK22 → SK24 →. Alternatively, the determination in step SD2 in FIG. 11 may be whether or not the distance from the host vehicle to the destination or stopover is less than a predetermined distance. In this case, in step SD4, the business type, brand, price, name, telephone number, etc. of the destination or stopover are displayed on the third screen.
[0466]
(4) In addition to (1), (2) and (3) above, the information displayed on the second screen 108 (or third screen 110) in FIG. 10, FIG. 14 or FIG. In addition, a detailed road map including the narrow streets may be displayed.
[0467]
In addition to the above, step SK2 may be omitted, and the process of steps SK6 → SK7 →... May be entered while the divided screen of each process of FIG. Or you may enter into the process of step SD2 or step SD10, with the division | segmentation screen by each process of FIG. 19 or FIG. 21 displayed. Thereby, the display contents of the divided screens are switched simultaneously.
[0468]
In addition to the above, icons such as “Detail”, “Outline”, “Intersection”, “Map orientation”, “Screen division”, “Change scale”, “Route forward display”, “All route display”, etc. for each divided screen May be displayed, and a switch corresponding to the icon may be operated by the operator, and the display content may be switched individually for each divided screen.
[0469]
(5) In addition to the above (1), (2), (3), and (4), the screen may return to the single screen display while the divided screens by the processes of FIG. 6, FIG. 19, or FIG. In this case, the map information displayed on this single screen is the map information displayed on any of the above-mentioned divided screens, the map information not displayed on any of these divided screens, or the original information before the screen division. Map information.
[0470]
In this case, switching to a single screen is performed by the above-described switching operation by the operator, change in the traveling state of the own vehicle, change in the speed of the own vehicle, change in the direction of the own vehicle, intersection or turn point to the own vehicle. Based on a change in distance, a change in distance to a destination or stopover, etc.
[0471]
In accordance with this display switching, the above steps SK16, SK24, SD4, SC6, SC8, SC18, SC20, SK8, SK10, SK12, SK14, SK20, SK22, SK24 are executed. In this case, the display information is displayed not on the split screen but on the entire screen of the display 33.
[0472]
(6) FIGS. 10, 14, 16, 20, 24, 25, 30, 30, 32, 33, 41, 42, 43, 44, 51, FIG. 52 and FIGS. 68 to 73, the screen closer to the driver is the third screen 110. However, the third screen 110 and the second screen 108 may be interchanged according to the left steering wheel and the right steering wheel or according to a change in the traveling state of the host vehicle. In this case, the switching operation of the above-mentioned operator, the change in the traveling state of the own vehicle, the change in the speed of the own vehicle, the change in the direction of the own vehicle, the change in the distance from the intersection or the turning point to the own vehicle, the destination or the stop 6, 19, 21, 22, 22, 27, 34, 35, 36, 37, 38, 39, 49, and 64 based on the change in the distance to the ground. The computer program in the flowcharts of FIGS. 65, 66 and 67 is changed.
[0473]
In this change, the above steps SC6, SC8, SC18, SC20, SD12, SD14, SE120, SG16, SK12, SK14, SK8, SK10, SK20, SK22, SK24, SL12, SL34, SL36, SP14, SP38, SP40, SQ26, SQ28, ST12, ST14, SU12, SV22, SX12, SX14, SX20, SX22, SX62, SX64, SX72, SX94, SX112, SX122, SX123, SX132, SX140, SX141, SX146, SX147, etc. The information displayed on the screen is switched between the third screen 110 and the second screen 108.
[0474]
Or, in steps SC6 and SC8, steps SC18 and SC20, steps C18 and SC20, steps SK12 and SK14, steps SK8 and SK10, steps SK20 and SK22, steps SK20 and SK24, etc., so far displayed on the second screen 108 The displayed information is moved to the third screen 110, the information displayed on the third screen 110 is moved to the second screen 108, and both display screens are switched. Thereby, the display contents of the respective divided screens can be interchanged with each other.
[0475]
(7) In addition to the above, the map displayed on the second screen of the first embodiment is north, northeast, east, southeast, south, southwest with respect to the map displayed on the third screen. It may be a map running in the direction, west or northwest. In this case, for example, it is determined whether or not the mode determined in step SB16 of the first embodiment is the map display mode connected in the above direction. If the mode corresponds to step SB16, map display suitable for the mode is performed in step SB18. For example, the map displayed on the third screen is the north-up screen. In this case, it is assumed that the map display mode for connecting in the east direction is selected.
[0476]
The geographical coordinate detection of the map connection part is performed in step SD20 in which the cross point CSP at the end of the third screen in FIG. 11 (third screen display processing) is detected. That is, in this step SD20, the geographical coordinates at the east end of the map displayed on the third screen are detected. In response to the mode selection, in step SB18 in FIG. 6, a map connected to the east end of the map displayed on the third screen is displayed on the second screen.
[0477]
Furthermore, the map display of the second screen may be performed when the operation is detected based on the operation of the operator, the operation of the installer, or the like. Furthermore, the position of the driver may be detected by an object detection sensor provided on the surface near the navigation device, for example, an infrared sensor. And the map display process to the said 2nd screen may be performed by this driver | operator's position. Further, the map display processing of the second and third screens may be performed by a change in the traveling state of the own vehicle detected by a speed sensor or the like or a change in the vehicle speed of the own vehicle.
[0478]
Furthermore, the map display of the said 2nd, 3rd screen may be performed by the change of the azimuth | direction of the own vehicle detected by a relative direction sensor. Depending on the travel position of the guide route, a change in the distance from the intersection or a turning point to the own vehicle, and a change in the distance to the destination or stopover are detected, and the second and third screens are displayed according to the detection result. May be.
[0479]
(8) In addition to the above, the map displayed on the third screen may be map information representing the surroundings of the host vehicle, the departure place, the destination, a stop-in place, or any selected place. And the map connected with one direction of all the directions of the map displayed on this 3rd screen may be displayed on the 2nd screen. That is, it is assumed that a map around the destination (stop-by place, designated place, etc.) is displayed on the third screen. On the second screen, a map that is connected to the map on the third screen and that includes a guide route that leads from the departure place to the destination may be displayed. The process in this case is also performed in step SD20 of the third screen display process in FIG. That is, the geographical coordinates corresponding to the edge of the map displayed on the third screen are detected in step SD20 or the like. In step SB18 of FIG. 6, a map connected to the geographic coordinates of the edge of the third screen is displayed on the second screen.
[0480]
Furthermore, the map connected to the 3rd screen displayed on a 2nd screen may be a map connected on the driving | running | working extension line of the own vehicle. That is, when the vehicle is not traveling on the guide route, a map around the destination is displayed on the third screen. A map connected to the third screen is displayed on the second screen. However, since the vehicle is not traveling on the guide route, the second screen may not include the guide route. In addition, a map of a direction unrelated to the position of the own vehicle or the guide route may be displayed on the second screen.
[0481]
Furthermore, the maps displayed on the second and third screens may have their display centers shifted from each other. The display ranges of the maps may not be overlapped with each other on the second and third screens, and geographically separated maps may be displayed. Part of the map displayed on each of the second screen and the third screen may overlap.
[0482]
The present invention is not limited to the above embodiments, and various modifications can be made without departing from the spirit of the present invention. For example, the recording medium for storing various data shown in FIG. 2 may be a writable recording medium such as a floppy disk. Furthermore, the navigation device may be provided with a voice input device including an analog / digital converter. Each operation may be executed by a voice command input by the voice input device.
[0483]
In each of the above embodiments, the screen of one display 33 is divided into two display surfaces. This may be performed by two display devices. That is, two liquid crystal displays are disposed adjacent to each other in one housing. And before division | segmentation, one map is displayed by two liquid crystal displays. When division is instructed, different map information is displayed on each liquid crystal display.
[0484]
Furthermore, in one embodiment of the navigation device according to the present invention, all or part of the above-described flowchart may be executed in an information management center such as VICS or ATIS. This processing result (processing information) is received by the data transmitting / receiving device 27. For example, the destination setting process (step SA3) and the route search process (step SA4) shown in FIG. 5 are executed at the information processing center where the map information is stored. Then, the searched guide route data is transferred to the navigation device via the data transmission / reception device 27.
[0485]
In one embodiment of the navigation device according to the present invention, guidance display processing is executed based on the sent guidance route data. That is, information such as a search condition for a destination or a stop-in facility and a route search condition is sent from the navigation device to the information tube center. In the information management center, a search for a desired facility and a search for a route to the destination are executed based on the sent conditions. Then, information related to the search / extraction / search result is transmitted from the information management center to the navigation device together with the map information and the like.
[0486]
In the navigation device, the search facility is displayed on the display 33 based on the received search / extraction / search results. In this way, each facility can be searched, extracted, and searched based on the detailed and latest information on each facility around the current position of the vehicle. In addition, in the facility search, it is possible to perform a search in consideration of the environmental change of the surrounding road (new establishment of a one-way road, etc.) In this case, information about each facility stored in the information management center needs to be constantly updated.
[0487]
Furthermore, you may enable it to use the information storage part 37 which memorize | stored each program demonstrated in 1 Example which concerns on this invention, and information, such as a map and a display symbol, with a general computer apparatus. That is, the program stored in the information storage unit 37 is a program that can be executed by a general computer. If this information storage unit 37 is connected to a portable computer device together with a device that can detect the current position by the GPS receiver 25, navigation processing can also be performed by this computer device. Furthermore, the present invention can also be applied to navigation devices such as vehicles other than automobiles, ships, airplanes, helicopters, etc. The map used for navigation may be a nautical chart or a submarine map in addition to a road map. Furthermore, the present invention may be applied not only to a navigation device mounted on a moving body such as an automobile, but also to a portable navigation device. That is, the present invention may be applied to a small navigation device that can be carried by a human being used in cycling, traveling, mountain climbing, hiking, fishing, or the like.
[0488]
39. Overview of each example
[1] The navigation apparatus according to the first embodiment of the present invention described above divides a screen for displaying map information into two or more screens (step SB4 in FIG. 6, step SC4 in FIGS. 11 and 13). ) And the first map information stored or received is displayed on one or more of these screens (steps SB12, SB24, SB28 in FIG. 6, steps SC10, SC14 in FIG. 11, and step SC24 in FIG. 13). The second map information different from the displayed first map information is simultaneously displayed on a screen other than the displayed screen (steps SB16, SB18, SB22, SB26 in FIG. 6 and step SC8 in FIG. 11). , SC12 and steps SC20, SC22 of FIG. 13), and the first map information and the above The second map information is characterized by display control of different map information of different road types (display examples—steps SB16, SB18, SB22, SB26 of FIGS. 8, 12, and 6). 11 steps SC8 and SC12 and steps SC20 and SC22 of FIG. 13).
[0489]
[2] In the navigation apparatus according to the first embodiment of the present invention described above, the road type is information on navigation target roads and non-guide target roads, and the first map information is navigation guidance. It is information on a target road and a non-guide target road, and the second map information is information on only a navigation target road for navigation.
[0490]
[3] The navigation device according to the first embodiment of the present invention described above divides the screen for displaying the map information into two or more screens (step SB4 in FIG. 6, step SC4 in FIGS. 11 and 13). The first map information stored or received is displayed on one or more of these screens (steps SB12, SB24, SB28 in FIG. 6, steps SC10, SC14 in FIG. 11 and steps in FIG. 13). SC24), the second map information different from the displayed first map information is simultaneously displayed on a screen other than the displayed screen (steps SB16, SB18, SB22, SB26 and FIG. 11 in FIG. 6). Steps SC8 and SC12 and Steps SC20 and SC22 of FIG. 13) In the navigation device, the map direction of the displayed first map information and Serial second orientations with different display control map of map information displayed (display example - 12, step SC20, SC22 step SC8, SC12 and 13 of FIG. 11) that is characterized.
[0491]
[4] In the navigation device according to the first embodiment of the present invention described above, in addition to the feature of [3], the first map information is displayed by north-up, and the second map information is It is characterized by display by heading up.
[0492]
[5] The navigation device according to the first embodiment of the present invention described above displays a screen for displaying the map information in addition to the features of [1], [2], [3] or [4]. The switching of the contents is detected (step SC4 in FIGS. 6, 11, and 13), and the first map information is made the map information displayed before the switching according to the detection result ( Steps SB12, SB24, and SB28 in FIG. 6, steps SC10 and SC14 in FIG. 11, and step SC24 in FIG. 13). Similarly, according to the detection result, the second map information is displayed as the map information to be displayed after the switching ( Steps SB16, SB18, SB22, and SB26 in FIG. 6, steps SC8 and SC12 in FIG. 11, and steps SC20 and SC22 in FIG. 13). That.
[0493]
[6] The navigation device according to the first embodiment of the present invention described above switches the display contents in addition to the features of [1], [2], [3], [4] or [5]. The previous display screen is not divided or has been divided, and the display contents can be switched by the operator's switching operation, changes in the running state of the vehicle, changes in the vehicle speed, changes in the direction of the vehicle. , Depending on the change in the distance from the intersection or the turning point to the own vehicle, the change in the distance to the destination or stopover (step SB4, SB10, SB20 in FIG. 6, step SC4 in FIG. 11, step SC4 in FIG. 13) ).
[0494]
[7] The navigation device according to the first embodiment of the present invention described above has the above feature [1], [2], [3], [4], [5], or [6]. The first map information or the second map information is sequentially switched to another map information, whereby the display contents of a part or all of the divided screen are further switched individually or simultaneously (step of FIG. 6). SB16, SB18, SB22, SB24, SB26, SB28) or the first map information or the second map information is changed to a single screen that is not divided in accordance with the further switching of the display content of the screen. The map information displayed on one screen is the first map information, the second map information, the map information different from the first map information and the second map information, or the original map before the screen division. Information, The displayed contents can be changed by the operator's switching operation, changes in the running state of the vehicle, changes in the vehicle speed, changes in the direction of the vehicle, changes in the distance from the intersection or turn point to the vehicle, destination Alternatively, it is characterized by the change in the distance to the stop-off place (steps SB4, SB10, SB20 in FIG. 6, step SC4 in FIG. 11, step SC4 in FIG. 13, etc.)
[0495]
[8] The navigation device according to the first embodiment of the present invention described above is characterized by the above [1], [2], [3], [4], [5], [6] or [7]. In addition, the screens on which the first map information and the second map information are displayed are interchanged with each other. This interchange is performed by the operator, the installer, the driver's position, The above divided screens based on changes in driving conditions, changes in the speed of the vehicle, changes in the direction of the vehicle, changes in the distance from the intersection or turn point to the vehicle, and changes in the distance to the destination or stopover The first map information or the second map information is displayed on the screen close to the driver among them (the third screen 110 in FIG. 8, FIG. 12, the steps SB22, SB24, SB26, SB28, FIG. 6). 11 steps SC8, SC10, SC12, SC14 Step Beauty Figure 13 SC20, SC22, SC24, etc.), characterized in.
[0496]
[9] The navigation device according to the first embodiment of the present invention described above is the above [1], [2], [3], [4], [5], [6], [7] or [7] 8], the map information is map information relating to the searched route from the departure point of the own vehicle or the vicinity of the current position to the destination or stopover location. The map information is information of a simplified diagram representing the geographical relationship between the departure point or current position of the vehicle and the vicinity of the destination or stopover (step SB6 in FIG. 6, step SC24 in FIG. 13), and the second map. The information is detailed geographical information near the current position of the vehicle (steps SB16, SB24, and SB26 in FIG. 6), or the first map information is based on the traveling information of the vehicle on the searched route. It is travel information (step SB12), the second map information is detailed geographical information near the current position of the own vehicle, or the first map information is information on a main road and a non-main road or a navigation target road and a non-target road. Information (steps SB16, SB24, SB26, etc. in FIG. 6), the second map information is mainly information about only the main road or only the target road for navigation (steps SB18, SB22, SB28 in FIG. 6), Alternatively, the first map information is a north-up display, the second map information is a heading-up display, or the first map information has an absolute north direction in any direction on the screen. The map information is almost maintained (step SC22 in FIG. 13, etc.), and the second map information keeps the traveling direction of the vehicle in any direction on the screen. Characterized in that the the information of the map (such as step SC20 of FIG. 13).
[0497]
[10] The navigation device according to the second and third embodiments of the present invention described above divides the screen for displaying the map information into two or more screens (step SB12 in FIG. 6), and one or more of these screens are displayed. The first map information stored or received is displayed on the screen, and the second map information stored or received is different from the displayed first map information on a screen other than the displayed screen. The first map information is map information displayed by a predetermined process, and the second map information is map information (second screen of FIG. 14) connected to the first map information. 108).
[0498]
[11] The navigation device according to the second and third embodiments of the present invention described above divides the screen for displaying the map information into two or more screens (step SB12 in FIG. 6), and one or more of these screens are displayed. The first map information stored or received is displayed on the screen (step SB14 in FIG. 6), and the screen other than the displayed screen is different from the displayed first map information and stored or received. The displayed second map information is displayed at the same time (step SB18 or SB22 in FIG. 6), and the first map information includes the map information representing the surroundings of the own vehicle, or the departure point of the own vehicle or the vicinity of the current position. It is information of a simplified diagram (FIG. 17) representing the geographical relationship with the destination or near the stop-off location, and the second map information is connected to the first map information and is a map of the destination direction of the own vehicle (FIG. 14 second Surface 108), characterized in that it is a map information that can display a map of the vicinity of the departure or current position of the vehicle to the vicinity of the destination or the drop-in place (second screen 108 of FIG. 16).
[0499]
[12] In the navigation device according to the second and third embodiments of the present invention, in addition to the characteristics of [10] or [11], the map information includes information on navigation target roads and non-guide target roads. It is included in the first map information or / and the second map information.
[0500]
[13] The navigation device according to the second and third embodiments of the present invention detects the switching of the display content of the screen displaying the map information in addition to the features of [10], [11] or [12]. (Steps SB10, SB16, and SB20 in FIG. 6), and according to the detection result, the first map information is made the map information displayed before the switching (step SB14 in FIG. 6). Similarly, according to the detection result, the second map information is the map information to be displayed after the switching.
[0501]
[14] In the navigation device according to the second and third embodiments of the present invention, in addition to the features of [10], [11], [12] or [13], the display screen before switching the display content is divided. It is not divided or divided (step SB2 in FIG. 6), and the display content is switched by an operator switching operation, a change in the traveling state of the own vehicle, a change in the vehicle speed of the own vehicle (step SD10 in FIG. 11). ), Changes in the direction of the vehicle, changes in the distance from the intersection or turn point to the vehicle (step SD2 in FIG. 11), and changes in the distance to the destination or stopover point.
[0502]
[15] The navigation device according to the second and third embodiments of the present invention has the above-described features of [10], [11], [12], [13] or [14], and the divided screens. The scale of the displayed map is changed individually or in conjunction (step SE4 in FIG. 12, step SG4 in FIG. 15).
[0503]
[16] In addition to the features of [10], [11], [12], [13], [14] or [15], the navigation device according to the second and third embodiments of the present invention includes the first The map information or the second map information is further sequentially switched to another map information, whereby the display contents of a part or all of the divided screens are further switched individually or simultaneously, or the first map information Either the map information or the second map information, or the map information different from the first map information and the second map information, or the original map information before the screen division is changed according to the further switching of the screen. It is displayed on a single screen that is not divided (step SB6 in FIG. 6), and the switching of the display contents is performed by an operator's switching operation, a change in the traveling state of the own vehicle, a change in the vehicle speed, Change, intersection or song Changes from the point of the distance to the vehicle that is characterized in that in accordance with the change of the distance to the destination, or drop-in place.
[0504]
[17] The navigation device according to the second and third embodiments of the present invention is in addition to the features of [10], [11], [12], [13], [14], [15] or [16]. The screens on which the first map information and the second map information are displayed are interchanged with each other, and the interchange is performed by the operator's operation, the installer's operation, the driver's position detection, and the traveling state of the host vehicle. Of the above-mentioned divided screens based on changes in vehicle speed, changes in the speed of the vehicle, changes in the direction of the vehicle, changes in the distance from the intersection or turn point to the vehicle, and changes in the distance to the destination or stopover The first map information or the second map information is displayed on a screen close to the driver.
[0505]
[18] The navigation device of the second and third embodiments of the present invention is the above [10], [11], [12], [13], [14], [15], [16] or [17]. In addition to the above features, one of the first map information and the second map information is displayed by north up (steps SK8 and SK14 in FIG. 19), and the other is displayed by heading up (in FIG. 19). Step SK10, SK12), or the first map information and the second map information are information on a map in which one of the absolute directions of the north is substantially maintained in any direction on the screen, and the other is the own vehicle. Is the map information in which the traveling direction of the map is substantially maintained in any direction on the screen, or the first map information and the second map information are the same scale or different scales, and the second map Information on the first location For the information, the map information is connected to the north, northeast, east, southeast, south, southwest, west or northwest, and these map information includes the operation of the operator, the operation of the installer, the detection of the position of the driver, Either based on changes in the driving state of the vehicle, changes in the speed of the vehicle, changes in the direction of the vehicle, changes in the distance from the intersection or turn point to the vehicle, changes in the distance to the destination or stopover Is selected.
[0506]
[19] The navigation device according to the second and third embodiments of the present invention is the above [10], [11], [12], [13], [14], [15], [16], [17] or In addition to the feature of [18], the first map information is map information representing the periphery of the own vehicle, a departure place, a destination, a stop-off place, or an arbitrary selected place, and the second map information is , The information of the map that is connected to this first map information,
The map of the second map information is adjacent to the map of the first map information or adjacent to the map of the first map information along the traveling direction or the search route of the own vehicle. The display centers of the maps are shifted from each other, and the display ranges of the maps are not overlapped or partially overlap each other.
[0507]
[20] In the fourth and fifth embodiments according to the present invention described above, the display screen is divided into two or more screens (step SL10 in FIG. 22 and step SP12 in FIG. 27). The first guide route information is displayed on one or more of the screens (step SL12 in FIG. 22 and step SP14 in FIG. 27), and the one or more sides other than the screen on which the first guide route information is displayed, Second guide route information different from the first guide route information is displayed (step SL12 in FIG. 22 and step SP14 in FIG. 27).
[0508]
[21] The fourth and fifth embodiments according to the present invention described above perform route guidance according to a preset route (SA2 to SA6 in FIG. 5), which is different from the preset route. When a command for searching for a route is issued (step SL4 in FIG. 22, step SL28 in FIG. 22, step SP6 in FIG. 22, step SP32 in FIG. 27), the search is executed (steps SL8, SL26 in FIG. 22, FIG. 27). Steps SP10 and SP30), the display screen is divided into two or more screens (Step SL10 in FIG. 22 and Step SP12 in FIG. 27), and one or more of the divided screens are displayed as first guide route information. Information on a preset route is displayed (step SL12 in FIG. 22, step SP14 in FIG. 27), and a screen displaying the first guide route information is displayed. To one or more screens, and the as the second guide route information first guide route information for displaying information different routes (step of FIG. 22 SL12, step SP14 in Fig. 27) it is characterized.
[0509]
[22] In the fifth embodiment of the present invention described above, route guidance is performed according to a preset route (SA2 to SA6 in FIG. 5). Is issued (steps SP2 and SP6 in FIG. 27), the search is executed (step SP10 in FIG. 27), and the display screen is divided into two or more screens (step SP12 in FIG. 27). One or more screens other than the screen on which the first guide route information is displayed are displayed on one or more screens of the displayed screens as route information preset as the first guide route information (step SP14 in FIG. 27). The new route searched as the second guide route information is displayed on the screen (step SP14 in FIG. 27).
[0510]
[23] In the navigation device according to the fourth and fifth embodiments of the present invention described above, in addition to the features of [20], [21] or [22], the first and second guide route information is Connects the information of the route searched or received from the departure point or current position of the own vehicle to the input destination or near the stop point, or the guidance route from which the own vehicle left and the current position of the own vehicle. It is characterized by route information (steps SL8 and SL26 in FIG. 22, steps SP10 and SP30 in FIG. 27).
[0511]
[24] The navigation devices according to the fourth and fifth embodiments of the present invention described above each time a search command is input in addition to the above feature [20], [21], [22] or [23]. The first guide route information and / or the second guide route information is switched to other guide route information (steps SL24, SL26, SL12 in FIG. 22, steps SP28, SP30, SP14 in FIG. 27). Features.
[0512]
[25] In the navigation devices according to the fourth and fifth embodiments of the present invention described above, a search command is input in addition to the features of [20], [21], [22], [23] or [24]. Each time the first guide route information is used as the second guide route information, the second guide route information is used as information on a new route searched or received ( Steps SL24, SL26, SL12 in FIG. 22 and steps SP28, SP30, SP14 in FIG. 27).
[0513]
[26] The navigation device according to the fourth and fifth embodiments of the present invention described above has the above-mentioned features [20], [21], [22], [23], [24] or [25], The first and second guide route information may be the main name of the guide route and / or the passing point name and / or the total length of the guide route and / or the passage time (FIGS. 32 and 33). .
[0514]
[27] The fourth and fifth embodiments according to the present invention described above are the features of the above [20], [21], [22], [23], [24], [25] or [26]. In addition, when one of the first and second guide route information is selected, guidance by the selected guide route is started and the screen is divided or a single screen displaying only the selected guide route. (Steps SL23, SL34, and SL36 in FIG. 22, steps SP25, SP38, and SP40 in FIG. 27).
[0515]
[28] The fourth and fifth embodiments according to the present invention described above perform route guidance according to a preset route (SA2 to SA6 in FIG. 5). In the navigation device, a display device for displaying guidance route information (Image memory 10 in FIG. 1, display 33), display processing means for outputting guidance information to the display device (image processor 9 in FIG. 1), and an instruction to search for a route different from a preset route (Steps SL4 and SL28 in FIG. 22, steps SP6 and SP32 in FIG. 27) and a route for searching for a route different from a preset route when an instruction to search for a route is given by the input of the input unit. Search means (steps SL8 and SL26 in FIG. 22, steps SP10 and SP30 in FIG. 27), and the display processing means is provided by the route search means. When a route different from the set route is searched, the screen displayed on the display device is divided into two or more screens (step SL10 in FIG. 22 and step SP12 in FIG. 27). First guide route information relating to a preset route is displayed on one or more screens (step SL12 in FIG. 22 and step SP14 in FIG. 27), and one or more other than the screen on which the first guide route information is displayed The second guide route information relating to a route different from the first guide route information is displayed on the screen (step SL12 in FIG. 22, step SP14 in FIG. 27).
[0516]
[29] The fourth and fifth embodiments according to the present invention described above provide route guidance according to a preset route (SA2 to SA6 in FIG. 5). (Image memory 10 in FIG. 1, display 33), display processing means for outputting guidance information to the display device (image processor 9 in FIG. 1), and a route for detecting that the vehicle has deviated from a preset route. A departure detection means (step SP2 in FIG. 27), and a route search means (step SP10 in FIG. 27) for searching for a new route when the departure from the route is detected by the departure detection means. The display processing means divides the screen displayed on the display device into two or more screens when a new route is searched by the route search means (step SP12 in FIG. 27). The first guide route information related to the preset route is displayed on one or more screens out of the displayed screens (step SP14 in FIG. 27), and one or more screens other than the screen displaying the first guide route information are displayed. The second guide route information relating to the new route searched by the route search means is displayed on the screen (step SP14 in FIG. 27).
[0517]
[30] The navigation device according to the sixth embodiment of the present invention described above searches for a route to the destination or stopover (steps SA4 and SA5 in FIG. 5), and the current position is determined from the searched route. Is detected (step SQ2 in FIG. 34), and in response to this detection, the searched route, the return route to the return point to return to the destination or stopover point is searched again ( In step SR4 in FIG. 35, the display screen of the display means for displaying the map information is divided into two or more screens (step SR10 in FIG. 35), and the re-searched return is displayed on one or more of these screens. The route is displayed (step SR10 in FIG. 35).
[0518]
[31] In the navigation device according to the sixth embodiment of the present invention described above, in addition to the feature of [30], the searched original route is displayed on the other divided screen (see FIG. 35, step SR14), and the display scale of each of the divided screens is the same as the display scale of the screen that has been displayed so far.
[0519]
[32] The navigation device according to the sixth embodiment of the present invention described above, in addition to the features of [30] or [31], leaves from the departure point where the current position deviates from the searched route to the current position. The navigation device also displays a non-traveling route from the departure point to the return point in the searched route, and the navigation device also displays a geographical relationship between the return route and the searched route. It is characterized in that it is displayed (see the application example of the embodiment).
[0520]
[33] In the navigation device according to the sixth embodiment of the present invention described above, in addition to the features of [30], [31] or [32], almost all of the return route is displayed on the divided screen. In this display control, the display scale is determined so that almost the entire return path is displayed on the divided screen (the initial display of the second screen in FIGS. 36 and 37), and the separation is performed. Display control is performed so that almost the entire route is displayed on the divided screen. In this display control, the display scale is determined so that almost the entire departure route is displayed on the divided screen, and the non-traveling route is determined. The display scale is determined so that almost the entire non-traveling route is displayed on the divided screen in this display control (sixth implementation). For example application Akira) it is characterized.
[0521]
[34] The navigation device according to the sixth embodiment of the present invention described above is displayed on the divided screen in addition to the features of [30], [31], [32] or [33]. The route is displayed so that the current position is at the center of the screen (the initial display of the second screen in FIG. 36), and is displayed so that the absolute north direction is substantially maintained in either direction of the screen, or the current position Is displayed so as to be substantially maintained in any direction of the screen (initial display of the second screen in FIG. 37).
[0522]
[35] In the navigation device according to the sixth embodiment of the present invention described above, in addition to the features of [30], [31], [32], [33] or [34], the divided screen is This screen is divided when the current position deviates from the above-mentioned search route, the switching operation of the operator, the change of the driving state of the current position, the change of the vehicle speed of the current position, the change of the direction of the current position , Executed in response to a change in the distance from the intersection or turn point to the current position, a change in the distance to the destination or stopover, this split screen is a change in the distance to the search route, an operator switching operation, Change according to changes in driving conditions at the current position, changes in the vehicle speed at the current position, changes in the direction of the current position, changes in the distance from the intersection or turn point to the current position, and changes in the distance to the destination or stopover point. It is, on the screen after coalescence, wherein the map information that was displayed before the screen split, the original searched route, or map information including the current position, is displayed.
[0523]
[36] A medium storing a computer program for navigation processing or map information processing according to the sixth embodiment of the present invention described above searches for a route to a destination or stopover in addition to the above features. (Step SA4 in FIG. 5), it is detected that the current position has deviated from the searched route (step SQ2 in FIG. 34), and in response to this detection, the searched route, the destination or The return route to return to the stopover is re-searched (step SR4 in FIG. 35), the screen displaying the map information is divided into two or more screens (step SR10 in FIG. 35), and one or more of these are displayed. The re-searched return route is displayed on the screen.
[0524]
【The invention's effect】
As described above in detail, the present invention displays the location of the facility searched together with the map display, and further, the location of the facility extracted together with the map display on a plurality of map display screens corresponding to each of the plurality of search conditions. Is displayed on one screen, search results are displayed in parallel, and search conditions such as destinations can be narrowed down in stages, so that destinations can be easily searched. Is. Further, the location of the facility searched together with the map display is displayed, and the location of the facility extracted together with the map display on the plurality of map display screens corresponding to each of the designated first and second search conditions. It is characterized by being displayed on the screen. Search results are displayed in parallel, and search conditions such as destinations can be narrowed down in stages, so that destinations can be searched easily. is there.
[Brief description of the drawings]
FIG. 1 is an overall circuit diagram of a navigation device.
2 is a diagram showing a data structure stored in data 38c of the information storage unit 37. FIG.
FIG. 3 is a diagram showing data stored in a RAM 5;
FIG. 4 is a diagram showing the structure of a road data file F4.
FIG. 5 is a flowchart of overall processing.
FIG. 6 is a flowchart of guidance / display processing according to the first embodiment.
FIG. 7 is a diagram showing a single screen display processing subroutine of the first embodiment.
FIG. 8 is a diagram showing a screen division processing subroutine of the first embodiment.
9 is a diagram showing a state of a screen displayed on the display 33. FIG.
FIG. 10 is a diagram showing a state in which the screen of the display 33 is divided.
FIG. 11 is a diagram showing a third screen display processing subroutine of the first embodiment.
FIG. 12 is a diagram showing a route forward display processing subroutine of the first embodiment.
FIG. 13 is a diagram showing a displayable range calculation processing subroutine of the first embodiment.
FIG. 14 is a diagram showing a state where the front of the guide route is displayed.
FIG. 15 is a diagram showing a whole route (front) display processing subroutine of the first embodiment;
FIG. 16 is a diagram showing a state where the rest of the guide route and the entire route to the destination are displayed.
17 is a diagram showing a simplified diagram displayed on the display 33. FIG.
18 is a diagram illustrating a circuit interposed between the image memory 10 and the display 33. FIG.
FIG. 19 is a diagram illustrating a flowchart of guidance / display processing according to the second embodiment;
FIG. 20 is a diagram showing a state of a divided screen of the display 33 according to the second embodiment.
FIG. 21 is a flowchart of guidance / display processing according to the third embodiment;
FIG. 22 is a flowchart illustrating guidance / display processing according to the fourth embodiment;
FIG. 23 is a diagram showing a state of a display screen on the display 33 before screen division.
24 is a diagram showing a screen division state of the display 33. FIG.
25 is a diagram showing a screen division state of the display 33. FIG.
FIG. 26 is a diagram showing a state in which the screen of the display 33 is returned to a single screen.
FIG. 27 is a flowchart of guidance / display processing according to a fifth embodiment of the present invention.
FIG. 28 is a diagram showing a state of a display screen on the display 33 before screen division.
29 is a diagram showing a screen division state of the display 33. FIG.
30 is a diagram showing a screen division state of the display 33. FIG.
FIG. 31 is a diagram showing a state in which the display 33 is returned to a single screen.
32 is a diagram showing a screen division state of the display 33. FIG.
33 is a diagram showing a screen division state of the display 33. FIG.
FIG. 34 is a diagram illustrating a flowchart of guidance / display processing according to a sixth embodiment;
FIG. 35 is a diagram illustrating a flowchart of off-route processing.
FIG. 36 is a diagram showing a flowchart of the first example of the initial display of the second screen in FIG. 35;
FIG. 37 is a diagram showing a flowchart of a second example of the initial display of the second screen in FIG. 35;
38 is a diagram showing a flowchart of the first embodiment of display adjustment of the second screen in the guidance / display processing of FIG. 34. FIG.
FIG. 39 is a diagram showing a flowchart of a second embodiment of display adjustment of the second screen in the guidance / display processing of FIG. 34;
FIG. 40 is a diagram showing a state of the display 33 before division.
FIG. 41 is a diagram showing a state of a split screen on the display 33 immediately after the departure from the guide route.
FIG. 42 is a diagram showing a state where a return route 258 is displayed on the second screen.
FIG. 43 is a diagram showing a state of a split screen on the display 33 when the host vehicle is far away from the guide route.
44 is a diagram showing a state where a return route 260 is displayed on the second screen in FIG. 43. FIG.
45 is a diagram showing a state where a return route 260 is displayed on the second screen in FIG. 43. FIG.
FIG. 46 is a diagram showing a display application example of the display 33 immediately after leaving the guide route.
FIG. 47 is a diagram for explaining each node such as a guide route.
FIG. 48 is a diagram illustrating a display area when a map is displayed on the second screen.
FIG. 49 is a diagram illustrating a flowchart of a nearest facility setting process.
FIG. 50 is a diagram illustrating an example of a genre list.
FIG. 51 is a diagram showing a state where a facility corresponding to a specified genre is displayed on a divided screen.
FIG. 52 is a diagram showing a state of a divided screen.
FIG. 53 is a diagram showing an extraction subroutine for facilities along a route;
FIG. 54 is a diagram showing a subroutine for calculating a shortest straight distance between a search facility and a guide route.
FIG. 55 is a diagram illustrating a positional relationship between a detected facility and a guide route.
FIG. 56 is an explanatory diagram of step SX36.
FIG. 57 is a diagram illustrating calculation of the shortest straight line distance.
FIG. 58 is a diagram showing postal code selection data 50;
59 is a diagram showing the contents of street list data 55. FIG.
60 is a diagram showing the contents of facility genre list data 60. FIG.
61 is a diagram showing the contents of street shape data 65. FIG.
62 is a diagram showing the contents of facility list data 70. FIG.
63 is a diagram showing the contents of area shape data 75. FIG.
FIG. 64 is a diagram illustrating a flowchart of destination setting processing (step SA3).
FIG. 65 is a diagram showing a representative point map display and destination setting subroutine;
FIG. 66 is a diagram showing a street name display and destination setting subroutine.
FIG. 67 is a diagram showing a genre list display and destination setting subroutine;
FIG. 68 is a diagram showing a state of a zip code and item selection screen.
FIG. 69 is a diagram illustrating a display example of a designated area.
FIG. 70 is a diagram showing a street list.
FIG. 71 is a diagram illustrating a street display state;
FIG. 72 is a diagram showing a screen display example of a genre list.
FIG. 73 is a diagram showing a state where a facility corresponding to a specified genre and a facility corresponding to a specific brand are displayed on a divided screen.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Central processing unit, 2 ... CPU, 3 ... Flash memory, 4 ... ROM, 5 ... RAM, 7 ... Sensor input interface, 8 ... Communication interface, 9 ... Image processor, 10 ... Image memory, 11 ... Sound processor , 13 ... Speaker, 20 ... Current position detection device, 21 ... Absolute orientation sensor, 22 ... Relative orientation sensor, 23 ... Distance sensor, 24 ... Speed sensor, 25 ... GPS receiver, 26 ... Beacon receiver, 27 ... Data transmission / reception Device ... 30 I / O device 33 ... Display 34 ... Touch panel 37 ... Information storage unit 38a ... Disk management information 39 ... Data transmission / reception unit

Claims (2)

In a navigation device that displays facilities searched according to search conditions together with a map display,
Storage means for storing map information and facility location coordinates;
An input means for specifying a search condition;
A search means for extracting from the storage means a facility corresponding to the search condition designated by the input means;
Display means for displaying the position of the facility extracted together with the map display by the map coordinates stored in the storage means and the position coordinates of the facility extracted by the search means,
The input means can specify a plurality of search conditions, and the display means can display a map on a plurality of map display screens corresponding to the plurality of search conditions when a plurality of search conditions are specified by the input means. A navigation apparatus characterized in that the location of a facility extracted together with the display is displayed in one screen. In a navigation device that displays facilities searched according to search conditions together with a map display,
Storage means for storing map information and facility location coordinates;
An input means for designating a second search condition for further narrowing down the search from the first search condition and the first search condition;
A search means for extracting a facility corresponding to the first search condition designated by the input means from the storage means and extracting a facility corresponding to the second search condition from the extracted facility;
Display means for displaying the position of the facility extracted together with the map display by the map coordinates stored in the storage means and the position coordinates of the facility extracted by the search means,
The display means displays the location of the facility extracted together with the map display on a plurality of map display screens corresponding to each of the first and second search conditions designated by the input means on one screen. A navigation device.

Images