JP5177691B2 - Portable navigation terminal and program - Google Patents

Description

  The present invention relates to a portable navigation terminal and a program, and in particular, when the portable navigation terminal is moving at high speed and the zoom-in (enlargement) operation is performed on a detailed map including the current position, the automatic scroll function is stopped. The present invention relates to a portable navigation terminal and a program which can be fixed to a state where a detailed map including the current position is displayed.

  Conventionally, when visiting a destination place on an unknown land, the user arrives while checking the roads, landmarks, and addresses drawn on the map using a map book or the like. In a car equipped with a car navigation system (hereinafter simply referred to as a car navigation system), a guidance displayed on a monitor screen or a voice output guidance (navigation) by starting the car navigation system and inputting a destination. Information) was reached.

  The car navigation system uses GPS (Global Positioning System), receives GPS signals transmitted from a plurality of GPS satellites flying on the earth with a GPS antenna, The position is specified by analyzing the included satellite position, distance information between the satellite and the receiver, clock information, and the like. At least four GPS satellites are required. The single positioning accuracy of GPS is generally over 10 m, but it is improved to 5 m or less by adopting DGPS (Differential GPS).

  In recent years, the performance of mobile communication terminal devices such as mobile phones and PHS has been dramatically improved, and multi-functionalization has been progressing. In particular, the data communication function is strengthened in addition to the call function, and various data communication services are provided to the user via the Internet. A navigation service is one of them, and attempts have been made to provide route guidance from the current position to the destination for not only automobile drivers but also mobile phone users.

  For example, the following Patent Document 1 (Japanese Patent Laid-Open No. 2003-28662) discloses a navigation system using a mobile phone with a GPS function. This navigation system includes means for receiving GPS signals transmitted from a plurality of GPS satellites with a GPS functioning mobile phone having a GPS receiving unit, a GPS control unit, and a GPS antenna built in the mobile phone, and the plurality of GPS signals. Means for packet-transmitting the position information obtained by analyzing the satellite position and the distance information between the satellite receivers and the clock information, and the data such as the telephone number of the mobile phone with GPS function and the search information; A map service having means capable of receiving and detecting the location of the mobile phone with GPS function and the destination and transmitting map data of appropriate scale, map information such as route information and distance to the mobile phone with GPS function A center is arranged.

  Further, the present applicant has already disclosed a navigation system using a mobile phone as a terminal in the following Patent Document 2 (Japanese Patent Laid-Open No. 2003-214860). As shown in FIG. 10, this navigation system is composed of a mobile terminal (mobile phone) 1 and a data communication service center (information distribution computer system) 3 connected to a mobile communication network 2. Connected to the communication service center 3 to receive a desired data communication service. When the mobile terminal 1 is a mobile phone or PHS, a call can be made with a desired partner (a fixed phone, a mobile phone, a PHS, etc.) via the mobile communication network 2 through the mobile communication base station or the telephone line network. it can. The data communication service center 3 is configured to provide a route navigation service in response to a request from the mobile terminal 1 as follows.

  That is, when a route search request including location information of the departure place and the destination is issued from the portable terminal 1, the information distribution computer system of the data communication service center 3 uses the road data accumulated in the accumulation means to start from the departure place. The optimum route connecting to the destination is searched, and the searched route data is temporarily stored in the storage means as guide route data. When display map information specifying the position coordinates and the guide route is requested from the portable terminal 1, the information distribution computer system of the data communication service center 3 displays the map in the vector format around the position coordinates specified by the storage means. Map data and designated guide route data are read out, the guide route data is converted into vector data for drawing a road in a specific color, incorporated into map data, and then sent to the requesting mobile terminal 1 It is.

  Although not shown, the portable terminal 1 is equipped with a GPS receiver for positioning the current position as it moves, and performs GPS positioning at a predetermined cycle. The portable terminal 1 issues a request for display map information to the information distribution computer system of the data communication service center 3 when there is a shortage in display map information as a result of GPS positioning. The information distribution computer system of the data communication service center 3 is provided with storage means for storing road data (map data), landmarks such as buildings on the map, intersection names, road names, and the like. Has been. These data are maintained by acquiring the latest data from the information distribution computer systems 5 and 6 that distribute the map via the Internet 4.

  Map information displayed in a navigation system or car navigation includes map information that covers detailed information of a small area such as a city area from map information that covers a wide area. For example, when using a portable navigation device while moving at high speed in a car In general, map information covering a wide area is used. When a portable navigation device is used while moving on foot, map information covering detailed information of a small area such as an urban area is generally used. The map information covering the wide area is composed of information on railways, main roads, major buildings, etc. The map information covering the city area is in addition to the information on the wide area map, fine roads within the covered area, intersections, stores, etc. Information is added and configured. A plurality of pieces of map information having different contents are referred to as map hierarchies (layers), and an appropriate map is selected from a plurality of maps according to the situation and used.

  Therefore, it is convenient if map information suitable for the usage status of the navigation device can be automatically selected. In order to satisfy such a requirement, for example, there is a mobile navigation device disclosed in Patent Document 3 (Japanese Patent Laid-Open No. 2002-5670). The navigation device for a moving body includes a map center provided with map information storage means for accumulating and managing a plurality of scale map information and map information search means for extracting necessary map information from the map information storage means. Is for transmitting the moving speed and current position information detected by the moving speed detecting means and the current position detecting means to the map center. Then, the map center extracts map information of the corresponding scale from the map information storage means from the current position information and the moving speed received from the navigation apparatus, and transmits the map information to the navigation apparatus. The map information received from the map center is displayed on the monitor together with the current position.

  Moreover, although it is not a communication-type navigation system by a navigation apparatus and a map center like the said patent document 3, the vehicle-mounted navigation apparatus which displays the map based on the road data corresponding according to speed is the following patent document 4 (patent No. 2,782,760). In this navigation device, the position detection means for detecting the current position of the vehicle, the speed detection means for detecting the traveling speed of the vehicle, and the current position detected by the position detection means make the vehicle position mark the center of the display. Is provided with map display means for scroll-displaying the road map. When the amount of information required for scroll display is a predetermined amount or more, if the traveling speed detected by the speed detecting means is a predetermined speed range, a map based on road data corresponding to the speed range is displayed. This is a navigation device that displays the road data separately according to the speed range.

  Furthermore, the following Patent Document 5 (Japanese Patent Laid-Open No. 10-222202) discloses a navigation device for a moving body that displays a map of the periphery at a scale corresponding to the moving speed of the moving body. This navigation apparatus includes position detecting means, speed detecting means, selecting means for selecting a map scale corresponding to the moving speed, map data storing means, arithmetic processing means, display means, and the like. The selecting means selects a map scale corresponding to the moving speed of the moving body detected by the speed detecting means, and the arithmetic processing means is selected by the selecting means based on the map data read from the map data storing means. This is a navigation device that generates map screen display data around the position of the moving body detected by the position detection means and displays the map on the display means at the reduced scale.

Japanese Patent Laying-Open No. 2003-28662 (FIG. 1) Japanese Patent Laying-Open No. 2003-214860 (FIG. 1) Japanese Patent Laying-Open No. 2002-5670 (FIG. 1) Japanese Patent No. 2782760 (FIG. 1) Japanese Patent Laid-Open No. 10-222202 (FIG. 1)

  In a communication type navigation system that uses a mobile phone as disclosed in Patent Document 2 as a navigation terminal and receives distribution of a map and route guidance from a data communication service center, there are various usage modes. . That is, when the user has a mobile phone (mobile navigation terminal) and receives route guidance to the destination by train or on foot, the user receives route guidance to the destination while moving by car, or It is assumed that the usage method varies depending on the situation, such as when the user receives distribution of map data while riding on a high-speed moving means such as the Shinkansen.

  A general navigation apparatus has a function of zooming in / out a map (zoom function) and a function of scrolling the displayed map. In addition, by selecting an auto mode in which these functions automatically operate and a manual mode in which the functions are operated by a user operation, these functions can be operated automatically or manually. Such devices have also been proposed. In the auto scroll, the display map is scroll-controlled so that the current position of the navigation device is at the center of the display screen, and in the manual scroll, the display map is scroll-controlled based on the direction and the scroll amount instructed from the operation unit. In the automatic zoom, a map having an appropriate size corresponding to the moving speed of the navigation device is selected. In the manual zoom, the display map is selected based on the zoom amount instructed from the operation unit.

  Therefore, in a communication-type navigation system that receives distribution of map information from the information distribution server, new display map data is required depending on the moving speed and / or current position of the navigation device by operating the zoom function and scroll function. In such a case, it is necessary to receive the map data from the information distribution server and display the map.

As mentioned earlier, when the mobile navigation terminal is moving fast, use a map of a wide area, and when the moving speed is slow, such as walking, use a city map to display the route and the current location of the mobile navigation terminal. It is preferable. Therefore, it is convenient if the configuration can select and display an appropriate map corresponding to the moving speed of the navigation device, such as the navigation device disclosed in Patent Document 3 to Patent Document 5.
In the case of adopting a configuration in which a map to be used is automatically switched corresponding to a moving speed like the navigation devices disclosed in these patent documents, the following inconvenience occurs. In other words, it may happen that you are approaching an area where you are on the Shinkansen that moves at high speed, notice that there is a building or event guide that interests you, and you want to display a map that includes the location on your mobile navigation terminal. . However, in the navigation devices disclosed in Patent Documents 3 to 5, the displayed map is automatically switched according to the moving speed, and the displayed map changes with movement by the navigation function. Since switching is performed following the current location, the inconvenience that the map of a certain point that has already passed cannot be continuously displayed on the display device occurs.

  Further, in the communication type navigation device, packet communication such as map information and route data occurs between the information distribution server and the portable navigation terminal. Therefore, when the mobile navigation terminal is moving at high speed, the transmission amount per unit time of the map transmitted from the information distribution server to the mobile navigation terminal increases with the movement of the current position. In particular, when a map enlargement display is requested during high-speed movement, a map download for scrolling immediately follows the download of a new map, resulting in an increase in communication load. Therefore, when the number of users is large, there arises a problem that the processing on the information distribution server side cannot catch up.

As a result of various studies to solve the above problems, the inventors of the present application send current location information to the information distribution server, receive map information and route information from the information distribution server, and display the map and route In the portable navigation terminal displayed on the means, if the map displayed at the time of the operation is fixed in accordance with the operation of the portable navigation terminal, the present invention is completed by paying attention to the above-mentioned problem can be solved. It has come to be.
In addition, by creating map information in vector format, the mobile navigation terminal side can handle zoom-in / zoom-out operations by zooming in / out with a predetermined scaling ratio from the map information of each layer. The present invention has been completed by paying attention to the fact that it can be solved.

  That is, the present invention has an object to solve the above-described problems. In a portable navigation terminal that selects and displays an appropriate map corresponding to the moving speed, the operation is performed by performing a map stop operation. It is a first object of the present invention to provide a portable navigation device, a map display method, and a program that can be fixed to a map displayed on a display unit in the vicinity of a broken point. It is a second object of the present invention to provide a portable navigation device, a map display method, and a program that can reduce the communication load between the information distribution server and the portable navigation terminal.

  Here, the fixation (stop) of the map in the present invention means that “the distribution of map data including a mesh divided by a predetermined latitude and longitude including the current position of the portable navigation terminal is received and displayed on the display means. The map displayed on the display means when the map stop operation is performed regardless of the current position of the mobile navigation terminal, or the enlarged map or reduced map within the mesh range of the map This means that even if the current position of the mobile navigation terminal changes, it does not change to new map data that includes the current position. Also, “automatic or manual scroll processing does not cause a new map data distribution request. ”(Stop scrolling beyond the mesh of the received map)” control.

The invention according to claim 1 of the present application is
Sends the current position information obtained from the GPS system to an information distribution server, map information from the information distribution server receives the route information in the mobile navigation terminal to be displayed on the display unit a map and route,
The portable navigation terminal includes speed detecting means for detecting the moving speed;
A map data request / acquisition section for requesting the map data of different types in accordance with the moving speed detected in the information distribution server, and acquires by the speed detecting means,
An auto scrolling means for displaying always place the current position by scrolling the map in the display means,
An operation section having the invalidates the automatic scroll means, a map stop button for the portable navigation terminal stops changing the type of map displayed on the display means at any time during the movement,
And a map change prohibition means for prohibiting the process for switching the type of map displayed on said display means in response to operation of the map stop button,
Wherein when the map stopping button is operated, the by the map change prohibition means, said prohibits the processing for switching to the speed corresponding to the moving speed detected by the detection means map displayed on said display means irrespective of the moving speed The display is continued without switching to another type of map.

The invention according to claim 2 of the present application is
Display a speed detecting means, and a map data request / acquisition section sends the current position information obtained from the GPS system to an information distribution server, map information from the information distribution server, map and route by receiving route information a portable navigation terminal to be displayed on the device, and disables the automatic scroll means, the portable navigation terminal map stop button for stopping the change of the type of map displayed on the display means at any time during movement an operation unit having a map change prohibition means for prohibiting the process for switching the type of map displayed on said display means in response to operation of the map stop button, the computer constituting the portable navigation terminal equipped with ,
And the treatment you detect the moving speed of the portable navigation terminal,
Map data of different types in accordance with the moving speed it detects requests to the information distribution server, and the processing you get,
Always the processing that displays a predetermined position of the current position by scrolling the map in the display means,
Wherein when the map stopping button is operated, it prohibits the processing for switching to the map corresponding to the moving speed and detect, without switching the map being displayed on the display unit regardless of the moving speed on a map of other types Processing to continue the display,
Is executed.

The invention according to claim 3 of the present invention, in the portable navigation terminal of claim 1, prior Symbol speed detecting means, the moving speed from the average traveling speed of the portable navigation terminal between two points obtained from the GPS system Is detected.

The invention according to claim 4 of the present application, the mobile navigation terminal according to claim 1, wherein the portable navigation terminal is equipped with acceleration sensors, the speed detecting means, the moving by integrating the output of the acceleration sensor you and detecting the speed.

  In the invention according to claim 1, in the portable navigation terminal that automatically switches and displays an appropriate map (any one of the wide area map to the city map) according to the moving speed, a map stop operation is performed at a certain point during movement. By doing so, the map changing operation can be prohibited and the map displayed at that time can be stopped, so that a detailed map of a specific point can be observed during high-speed movement.

  In the invention according to claim 2, the map change operation is prohibited by performing a map stop operation at a certain moving point on the computer constituting the portable navigation terminal, and the map currently displayed is stopped. It is possible to provide a portable navigation terminal capable of observing a detailed map of a specific point during high-speed movement.

  In the invention according to claim 3, the moving speed of the portable navigation terminal can be calculated from the average moving speed between the two points by using the GPS receiver. In the invention according to claim 4, the portable navigation terminal includes the acceleration sensor, and the moving speed of the portable navigation terminal can be detected by integrating the output of the acceleration sensor.

It is a block diagram which shows the structure of the portable navigation terminal concerning the 1st embodiment of this invention. It is a figure which shows the structure of the map data management table which memorize | stored the correspondence of the classification of a map, and a moving speed range. It is a block diagram which shows the structure of the portable navigation terminal concerning the 2nd embodiment of this invention. It is a figure which shows the structure of the map data management table in a 2nd embodiment, and the structure of an auto zoom and an auto scroll setting memory | storage part. FIG. 3 is a diagram illustrating an appearance of an operation unit of the portable navigation terminal 10. FIG. 3 is a diagram illustrating an appearance of an operation unit of the portable navigation terminal 10. It is a flowchart which shows the procedure of display mode control. It is a flowchart which shows the procedure of map drawing. It is a flowchart which shows the procedure of map selection. It is a figure which shows the structure of the portable navigation system which used the conventional mobile telephone as a navigation terminal.

  Hereinafter, specific examples of the present invention will be described in detail with reference to examples and drawings. FIG. 1 is a block diagram showing the configuration of the portable navigation terminal according to the first embodiment of the present invention. FIG. 2 is a diagram showing the configuration of a map data management table that stores the correspondence between map types and moving speed ranges. FIG. 3 is a block diagram showing the configuration of the portable navigation terminal according to the second embodiment of the present invention. FIG. 4 is a diagram showing the configuration of the map data management table and the configuration of the auto zoom and auto scroll setting storage unit in the second embodiment. FIG. 5 is a diagram illustrating an appearance of the operation unit of the portable navigation terminal 10, and FIG. 6 is a diagram illustrating an example of a map displayed on the display unit. FIG. 7 is a flowchart showing a display mode control procedure in the portable navigation terminal, FIG. 8 is a flowchart showing a map drawing procedure, and FIG. 9 is a flowchart showing a map selection procedure.

  The portable navigation terminal 10 according to the first embodiment of the present invention includes a GPS receiving unit 102 that receives a GPS signal from a GPS satellite 14 and a communication unit 101 for communicating with the information distribution server 20 via the Internet network 12. . The mobile navigation terminal 10 is specifically configured by a mobile phone, and the communication unit 101 is configured to perform wireless communication with a mobile phone base station in addition to packet communication via the Internet network 12. The portable navigation terminal 10 includes a main control unit 107 that is configured by a microcomputer or the like and controls the operation of each unit, receives a GPS satellite signal by the GPS reception unit 102, and based on this, the current position calculation unit 103 performs the current operation. Calculate the position. The current position information of the portable navigation terminal calculated by the current position calculation unit 103 is sent to the information distribution server 20 via the communication unit 101. Further, the portable navigation terminal 10 has an operation unit 16, and is configured to operate the operation unit 16 to input information on a departure place and a destination and send a route guidance (navigation) request to the information distribution server 20. Has been.

  The information distribution server 20 includes a map data distribution unit 22, a map data storage unit 24, and a route search unit 26. Based on the information on the departure point, the destination, and the current position transmitted from the mobile navigation terminal 10, the information distribution server 20 The search unit 26 performs a route search from the departure point to the destination, reads map data including the current position from the map data storage unit 24, embeds the guide route data searched by the route search unit 26 in the map data, and distributes the map data Delivered to the portable navigation terminal 10 by the unit 20. The mobile navigation terminal 10 receives the map data (including route guidance data) distributed from the information distribution server 20 via the communication unit 101 and the map data request / acquisition unit 105 and stores it in the map data storage unit 106. The display control unit 111 reads the map data stored in the map data storage unit 106 and performs control for displaying the map on the display unit 112.

  The mobile navigation terminal 10 includes speed detection means 104 and detects the moving speed of the mobile navigation terminal 10. The moving speed of the portable navigation terminal 10 can be detected by, for example, obtaining the average moving speed of the portable navigation terminal 10 between two points acquired from the GPS system, or an acceleration sensor is provided in the portable navigation terminal 10, It can be detected by integrating the output of the acceleration sensor. The moving speed detected by the speed detecting unit 104 is sent to the map data request / acquisition unit 105, and the map data request / acquisition unit 105 requests the information distribution server 20 to acquire map data corresponding to the moving speed. The association between the moving speed and the map requested from the information distribution server 20 can be easily performed by, for example, the map data management table shown in FIG. 2 in which the speed range and the map data type (wide area map to city map) are tabulated.

  FIG. 2 is a diagram showing the configuration of a map data management table that stores the correspondence between the map type and the moving speed range. This map data management table shows the map data of the four layers of the wide area map 1 to the city map 1. In this case, it is stored which type of map data the corresponding map data becomes when the moving speed of the portable navigation terminal 10 is in which speed range. In the case of the map data management table shown in FIG. 2, when the moving speed of the portable navigation terminal 10 is 100 km / h or more, the wide area map 1 is selected, and when the moving speed is 60 km / h or more and 100 km or less, the medium band map 1 is selected. The detailed map 1 is selected when the speed is 20 km or more and 60 km or less, and the city map 1 is selected when the speed is 20 km or less. Therefore, the map data request / acquisition unit 105 may determine the corresponding map data type by referring to the map data management table based on the moving speed, and transmit the map data type to the information distribution server.

  The operation unit 16 includes an auto zoom unit 108 for zooming (enlarging or reducing) the map displayed on the display unit 112 and an auto unit for automatically scrolling the map to maintain the current position at the center of the display screen. The auto button 161 for enabling the scroll means 109 and the instruction based on the operation of the auto button 161 are invalidated, the map displayed on the display means is stopped regardless of the moving speed, and the zooming in (manual) is manually performed. ), A zoom-in button 162 for zooming out (reducing), a zoom-out button 163, and manual scroll means 164 (up / down / left / right arrow keys) for switching to manual scrolling (manual).

  These buttons and keys are for operating the map displayed on the display means 112. For example, when the auto button 161 is operated, the auto zoom means 108 and the auto scroll means 109 are enabled, and the portable A map corresponding to the moving speed of the navigation terminal is selected and displayed on the display means 112, and the map is automatically scroll-displayed so that the current position of the portable navigation terminal is located at the center of the screen of the display means 112. The zoom-in button 162 and the zoom-out button 163 are manual operation buttons for enlarging or reducing the map displayed on the display unit 112. An up / down / left / right key indicated by reference numeral 164 has a function of a manual scroll operation. When this key is operated, the map displayed on the display means 112 is scrolled in a direction corresponding to the operated key.

  Further, the up / down / left / right key (manual scroll means 164), the zoom-in button 162, the zoom-out button 163, etc. have the function of a map stop button at the same time. Regardless of the moving speed of the map, the map change prohibiting means 110 prohibits switching to the map according to the speed. When the zoom-in button 162 or the zoom-out button 163 is operated, the auto-zoom means 108 and the auto-scroll means 109 are invalidated, the map change prohibiting means 110 is activated, and is related to the current position of the portable navigation terminal 10. The map displayed on the display means 112 at the time when the map stop operation is performed, or an enlarged map or a reduced map within the mesh range of the map is displayed, and the current position of the portable navigation terminal changes even if the current position changes. Control is performed so as not to change to new map data including a position, and control is performed so that a new map data distribution request is not generated by auto or manual scroll processing.

  The user uses the portable navigation terminal 10 while operating on the high-speed moving means such as the Shinkansen and operates the auto button 161 to receive the distribution of the map data and the route data of the current position from the information distribution server 20. When a map is displayed and a building or the like that is interested in the moving car window is discovered and you want to zoom in on the map data at that point and observe the map in detail, the zoom in button 162, zoom out button 163 or manual When a map stop button such as the scroll button 164 is operated, the map change prohibiting means 110 is activated, and the change of the map displayed on the display means 112 is prohibited. Accordingly, the user can fix the map data at the position in the middle of movement and display it on the display means 112 for observation while moving.

  Map data stored in the map data storage unit 24 of the information distribution server 20 is created in a vector format. In general, map data may be created in a bitmap format or a vector format. If the map data content is the same and the map is simply reduced or enlarged, the map data created in the bitmap format must be created in advance with the desired reduction ratio, bitmap data reduced and enlarged at the enlargement ratio. It is necessary to keep. For this reason, in addition to the map data of each layer, map data that has been reduced and enlarged is created in advance. On the other hand, the map data created in the vector format can be easily scaled by calculating the desired length of each element vector constituting the map by the reduction ratio and the enlargement ratio. Based on map data of a certain hierarchy, map data scaled to different reduction ratios and enlargement ratios can be obtained.

  Therefore, as shown in the map data management table of FIG. 2, the information distribution server 20 has different amounts of information in the map data as shown in the wide area map 1, the middle map 1, the detailed map 1, and the city map 1, that is, Different types of map data of four layers (A to D) may be stored, and map data may be distributed from the information distribution server 20 to the portable navigation terminal 10 when map data of different layers is required. Then, on the mobile navigation terminal 10 side, map data that is easily enlarged or reduced can be generated by performing a reduction / enlargement calculation at a predetermined ratio from the distributed map data. That is, map data enlarged and reduced at a predetermined ratio from map data in a certain hierarchy can be easily created. For example, the map data of the wide area map 2 and the wide area map 3 enlarged at a predetermined ratio from the map data of the wide area map 1 of the hierarchy A can be created. The same applies to map data at other levels. Thereby, the communication load of the map data between the information distribution server 20 and the portable navigation terminal 10 can be reduced. This specific example will be described in detail in Example 2 described later.

  FIG. 3 is a block diagram showing the configuration of the portable navigation terminal according to the second embodiment of the present invention. FIG. 4 is a diagram showing the configuration of the map data management table and the configuration of the auto zoom and auto scroll setting storage unit in the second embodiment. 3, the same reference numerals as those in FIG. 1 are given to the same components as those in FIG. As shown in FIG. 3, the portable navigation terminal 10 and the information distribution server 20 according to the second embodiment are basically configured in the same manner as the first embodiment shown in FIG. In the portable navigation terminal 10, the communication unit 101, the GPS reception unit 102, the current position calculation unit 103, the speed detection unit 104, the map data request / acquisition unit 105, the map data storage unit 106, the auto zoom unit 108, the auto scroll unit 109, Each unit of the map change prohibiting unit 110, the display control unit 111, and the display unit 112 has the same function as in FIG. In the information distribution server 20, the map data distribution unit 22, the map data storage unit 24, and the route search unit 26 also have the same functions as those in FIG.

  The mobile navigation terminal 10 and the information distribution server 20 shown in FIG. 3 are different from those shown in FIG. 1 in that a map data expansion / contraction processing means 115 is provided. In the configuration of the map data management table 114 shown in FIG. Auto-zoom setting storage unit 44 and auto-scroll display for setting whether or not auto-zoom display is performed for each map The difference is that it has an auto scroll setting storage unit 46 for setting whether or not to perform the operation, and the operation buttons and operation keys of the operation unit 16 are partially different.

  FIG. 4 shows the configuration of a map data management table similar to that in FIG. The map data stored in the map data storage unit 24 of the information distribution server 20 is map data created in a vector format, and includes four different layers A to D, that is, different information from the wide area map to the city map. This is map data composed. For example, the map data storage unit 24 stores only four map data of the wide area map 1, the mid area map 1, the detailed map 1, and the city map 1. The other wide area map 2 to the city map 2, the detailed map 3, and the city map 3 are obtained from the map data (vector data) of the wide area map 1 to the city map 1 by the map data expansion / contraction processing means 115 (see FIG. 3) of the portable navigation terminal 10. ) To create a scaling process at a predetermined scaling ratio. Therefore, the communication of the map data between the information distribution server 20 and the portable navigation terminal 10 need only be performed when a map having a different hierarchy is required, and the communication load can be reduced.

  Correspondence with the moving speed of the portable navigation terminal 10 is set in the auto zoom factor moving speed column for each map type from the wide area map 1 to the city map 3. For example, the wide area map 1 is set to 200 km / h or more. When the map is switched according to the moving speed according to this setting, when the moving speed repeatedly increases or decreases before and after the switching threshold value, the displayed map frequently changes and is difficult to observe, Increases communication load. For example, the mid-range diagram 1 is displayed at a speed of 100 km / h, but is switched to the wide-area diagram 2 at a speed of 101 km / h. At this time, the map data of the wide area map 1 or the mobile navigation terminal 10 is distributed from the information distribution server, and the map data of the wide area map 2 is created from this map data. When the speed is reduced to 99 km, the operation is switched to the middle region FIG. 1. At this time, the information distribution server distributes the map data of the middle region FIG. 1 to the portable navigation terminal 10. Therefore, when the moving speed frequently changes around 100 km / h, the map is switched each time, and communication of map data may be required.

  Therefore, in the map data management table of FIG. 4, as shown in the hysteresis setting column 42, a threshold value when the moving speed is switched in the increasing direction and a threshold value when the moving speed is switched in the decreasing direction as shown in the hysteresis setting column 42. Are set differently. For example, in the detailed diagram 1 and the mid-range diagram 2, when the moving speed is increasing, when the speed exceeds 100 km / h, the detailed diagram 1 is switched to the mid-range diagram 2, and when the speed exceeds 120 km / hr, the mid-range diagram 2 is selected. When the moving speed is in the decreasing direction, it is set so that when it falls below 80 km / h, it switches from mid-range figure 2 to detailed figure 1 and when it falls below 60 km / h, it switches from detailed figure 1 to detailed figure 2. ing.

  The map data management table 114 also includes an auto zoom setting storage unit (auto zoom setting storage unit) 44 for setting whether or not each map is a target of auto zoom processing in the auto zoom unit 108, and auto scroll unit. An auto-scroll setting storage unit (auto-scroll setting storage unit) 46 for setting whether or not to perform auto-scroll processing in 109 is provided, and is set by the user from the zoom / scroll setting unit 166 of the operation unit 16. be able to. Therefore, the user can arbitrarily set a map to be subjected to zoom processing and scroll processing in auto zoom and auto scroll.

  For example, the auto-zoom setting storage unit 44 in FIG. 4 is set so that the mid-range diagram 1, the detailed diagram 1, the detailed diagram 3, and the city map 2 are subject to auto-zoom processing, and the auto-zoom processing is set. This is done for the map data. Similarly, the auto-scroll setting storage unit 46 is set so that the wide-area map 1 to the city map 1 are targets of auto-scroll processing, and the auto-scroll processing is performed on the set map. This auto scroll setting is also used when the mobile navigation terminal 10 stops the map while moving. Details of this operation will be described later.

  The operation unit 16 is provided with a zoom-in button 162 and a zoom-out button 163 that are manual zooming means for manually zooming in (enlarging) and zooming out (reducing) the map displayed on the display unit 112. It has been. By operating the zoom-in button 162 and the zoom-out button 163, the auto-zoom means 108 is stopped, the map displayed on the display means 112 is stopped regardless of the moving speed, and thereafter, the zoom-in button 162 and the zoom-out button 163 The map can be manually enlarged or reduced by operation.

  Similarly to the zoom-in button 162 and the zoom-out button 163, the manual scroll unit 164 (with the function of stopping the map displayed on the display unit 112 and the function of switching to manual scroll (manual) regardless of the moving speed) Up / down / left / right arrow keys) are provided. Further, a clear button 165 for returning to the auto scroll operation is provided. The zoom / scroll setting means 166 is an operation unit for setting whether or not to make an auto zoom display target for each map and whether or not to make an auto scroll display target for each map.

  When the zoom-in button 162 or the zoom-out button 163 (manual zoom means) is operated, the auto-zoom means 108 is disabled, and each time the button is operated, the map is switched to a map reduced or enlarged by one step and displayed on the display means 112. Display is performed. When there is no further reduced or enlarged map, when the zoom-in button 162 or the zoom-out button 163 is operated again, the auto zoom means 108 is returned to the effective state.

  When the manual scroll means 164 is operated when the zoom in button 162 or the zoom out button 163 is not operated, both the auto scroll means 109 and the auto zoom means 108 are invalidated, and the map change prohibiting means 110 is valid. The map displayed on the display unit 112 is fixed when the manual scroll unit 164 is operated. Thereafter, scrolling can be performed by operating the manual scroll means 164, but scroll processing that requires map data of a new area is prohibited by the map change prohibiting means 110.

  For example, a map (wide area diagram 1) corresponding to the moving speed is displayed on the display means 112 during high-speed movement on the Shinkansen, and the display is automatically switched to the destination wide area map 1 by the auto zoom means along with the movement. If the user is interested in a building or the like at a certain point and wants to stop the map and zoom in on a detailed map or a city map, the zoom-in button 162, zoom-out button 163, or manual scrolling means 164 is operated, the map is temporarily stopped in the wide area map 1 displayed at that time, and then the zoom-in means 162 is operated to switch the display to the middle area map, the detailed map, and the city map.

  When returning from this state, the auto scroll means 109 is returned to an effective state by operating the clear button 165 while the manual scroll means 164 is not operated.

  FIG. 5 is a diagram showing an appearance of the operation unit 16 of the mobile navigation terminal 10 (mobile phone). In FIG. 5, a zoom-in button 162 (manual zoom means) and a zoom-out button 163 (manual zoom means), which are buttons for manually zooming in, are provided on the upper left and right sides of the button group, and a manual scroll button 164 ( Up / down / left / right keys) are provided. The zoom-in button 162, the zoom-out button 163, and the manual scroll button 164 have a function as a map stop button for stopping the map as described above. FIG. 6 is a diagram illustrating an example of a map displayed on the display screen of the mobile navigation terminal 10. As shown in the figure, a city map is displayed on the display screen, route guidance (navigation) is displayed, and it is displayed that each button of the zoom-in button and the zoom-out button is set downward and left and right. Yes. The basic configuration of the operation unit and the configuration of the display screen can be the same as those in the first embodiment shown in FIGS. Various modifications and changes are possible as required.

  Next, the map display control procedure in the portable navigation terminal 10 according to the second embodiment of the present invention described in FIGS. 3 and 4 will be described in detail. FIG. 7 is a flowchart showing the procedure of display mode control in the portable navigation terminal 10. In the display mode control, first, in step S101, it is checked whether the zoom-in button 162 or the zoom-out button 163 is operated to enter the manual zoom control mode. If the zoom-in button 162 has been operated, it is checked in step S102 whether the map displayed on the display means 122 is the city map 3. If it is not the city map 3, the displayed map is enlarged by one step in step S105. For example, when the map being displayed is the detailed diagram 3, the map is enlarged to the city map 1. In this case, since the map data has a different hierarchy, the corresponding map data is distributed from the information distribution server 20.

  If the map currently displayed in the check in step S102 is the city map 3, since no further enlarged map is prepared, the manual zoom operation is terminated and the auto zoom means 108 and the auto scroll means 109 are enabled in step S108. (ON) to return to the auto zoom / auto scroll display mode.

  If the zoom-out button 163 is operated in the check in step S101, it is checked in step S103 whether the map displayed on the display unit 122 is the wide area map 1 or not. If it is not the wide area map 1, the displayed map is reduced by one step in step S106. For example, when the map being displayed is the detailed diagram 1, the map is reduced to the middle region diagram 1. In this case, since the map data has a different hierarchy, the corresponding map data is distributed from the information distribution server 20. In step S109, the auto zoom processing means 108 is disabled (OFF), and the setting in the auto scroll setting storage unit 46 is checked in step S112. In the case of FIG. 1, since the auto scroll setting is “valid” (see FIG. 4), the process ends and the process returns. If “valid” is not set, the automatic scroll processing means 109 is disabled (OFF) in step S114, the process is terminated, and the process returns.

  On the other hand, if the map being displayed in the check in step S103 is the wide area map 1, since no further reduced map is prepared, it is checked in step S107 whether the clear button 165 is operated, and the clear button 165 is If not operated, the process is terminated and the process returns. If the clear button 165 has been operated, the auto scroll means 109 is enabled (ON) in step S110, the process is terminated, and the process returns.

  If neither the zoom-in button 162 nor the zoom-out button 163 has been operated in the check in step S101, or if the manual scroll button 164 has been operated in step S104, the auto-zoom means 108 and the auto-scroll in step S111. The means 109 is disabled (OFF), the map change prohibiting means 110 is activated and the map is stopped, and the manual scroll process can be performed in step S113.

Here, the meanings of the “valid” and “invalid” settings in the auto scroll setting storage unit 46 of FIG. 4 will be described. This setting means where the auto scroll means 1009 is stopped when the zoom-in button 162 is operated without touching the manual scroll means 164 (up / down / left / right keys). When the map is enlarged to the map set as “invalid” in the scroll setting storage unit 46, the auto scroll means 109 becomes invalid (OFF) (step S114). That is, in the portable navigation terminal 10 according to the present invention, the map can be expanded by operating the zoom-in button 162 after stopping the map by pressing the manual scroll means 164 (up / down / left / right key) a little. Further, even a person unfamiliar with the operation can disable the auto scroll means 109 and stop the map by operating only the zoom-in button 162.

  Next, a map drawing processing procedure in the portable navigation terminal 10 according to the second embodiment of the present invention will be described. FIG. 8 is a flowchart showing a map drawing procedure of the portable navigation terminal 10 shown in FIGS. First, in step S201, it is determined whether or not the auto zoom means 108 is valid (ON or OFF), that is, whether or not auto zoom processing is in progress. If the auto-zoom means 108 is valid (ON), a corresponding map is selected from the moving speed of the portable navigation terminal 10 in step S202, and the process proceeds to step S203. The correspondence between the moving speed and the map data is as described in the map data management table of FIG. 4, and the details of the map selection corresponding to the moving speed will be described later in detail using the flowchart shown in FIG. If the auto zoom means 108 is invalid (OFF), the process proceeds to step S203.

  Next, in step S203, it is determined whether or not the auto scroll processing means 109 is valid (ON or OFF), that is, whether or not the auto scroll processing is being performed. When the auto scroll means 109 is valid (ON), an area of the map to be drawn on the display means 122 is set so that the current position is located at the center of the display screen based on the current position information of the portable navigation terminal 10 in step S204. Determine and proceed to step S206. If the auto-scroll means 109 is invalid (OFF), the designated position designated by the operation of the manual scroll button 164 of the operation unit 16 of the portable navigation terminal 10 in step S205 (the point arbitrarily moved by the manual scroll button 164) ) To determine the area of the map to be drawn on the display means 122, and the process proceeds to step S206.

  In step S206, it is determined whether the map data determined in step S202 is stored in the map data storage unit 106 of the portable navigation terminal 10. If there is no corresponding map data in the map data storage unit 106, the portable navigation terminal 10 requests and acquires the corresponding map data from the information distribution server 20 in step S207. If there is map data corresponding to the map data storage unit 106, the map is displayed (drawn) on the display means 112 in step S208 in accordance with the drawing area determined in step S204 or step S205, and the return (one process is completed).

  Next, a map selection processing procedure in the portable navigation terminal 10 according to the second embodiment of the present invention will be described. FIG. 9 is a flowchart showing a map selection procedure of the portable navigation terminal 10 shown in FIGS. First, the moving speed is detected by the speed detecting means 104 of the portable navigation terminal 10 in step S301. In step S301, selection information on the currently selected map is saved. The save destination may be a temporary storage device (not shown) such as a RAM of the main control unit 107. Next, in step S302, it is checked whether or not the moving speed of the portable navigation terminal 10 exceeds the upper limit speed for the currently selected map. For example, if the currently selected map is the city map 2 and the moving speed of the portable navigation terminal 10 is 15 km / h or more, the process proceeds to step S303, and the city map 1 that is a one-step reduced map is temporarily stored. select.

  Then, in step S304, it is checked whether or not the temporarily selected city map 1 is subject to auto zoom. This check is performed by referring to the setting of the auto zoom setting storage means shown in FIG. In the example shown in FIG. 4, since the city map 1 is not set as an auto-zoom target, the determination is no and the process returns to step S302 to check the moving speed again. If the moving speed is 25 km / h or more, the detailed diagram 3 is provisionally selected in step S303, and the detailed diagram 3 is set as an auto-zoom target, so the determination is OK, and the map is determined (selected) in step S305. Is done.

  If the moving speed of the portable navigation terminal 10 does not exceed the upper limit speed in step S302, the process proceeds to step S306, and it is checked whether it is equal to or lower than the lower limit speed. The process from step S306 of the process for checking the lower limit speed to step S309 of the process for determining the map is the same as the process procedure from step S302 of the process for checking the upper limit speed to step S305 of the process of determining the map.

  If the movement speed is not lower than the lower limit speed in step S306, the process proceeds to step S310, where the saved map selection information is restored and the map is selected. That is, in this case, the map is not switched. Similarly, when the auto zoom setting is not performed on the map corresponding to the moving speed of the mobile navigation terminal 10, the process jumps to step S310 to restore the saved map selection information and select the map. Become.

  As described above in detail, according to the portable navigation terminal according to the present invention, in the portable navigation terminal that automatically switches and displays an appropriate map (any one of the wide area map to the city map) according to the moving speed. Since the map change operation can be prohibited by stopping the map at a certain moving point and the map displayed at that time can be stopped, the detailed map for a specific point can be observed during high-speed movement. Will be able to.

DESCRIPTION OF SYMBOLS 10 ... Mobile navigation terminal 12 ... Internet network 14 ... GPS satellite 20 ... Information distribution server 16 ... Operation part 161 ... Auto button 162 ... Zoom-in button (manual zoom means)
163 ..Zoom out button (manual zoom means)
164 ··· Manual scroll means 101 ·· Communication portion 102 ··· GPS receiver portion 103 ··· Current position calculation means 104 · · Speed detection means 105 ·· Map data request / acquisition portion 106 ··· Map data storage portion 107 ··· Control unit 108, Auto zoom means 109, Auto scroll means 110, Map change prohibiting means 111, Display control unit 112, Display means 22 ... Map data distribution unit 24 ... Map data storage unit 26 ..Route search unit

Claims (4)

Sends the current position information obtained from the GPS system to an information distribution server, map information from the information distribution server receives the route information in the mobile navigation terminal to be displayed on the display unit a map and route,
The portable navigation terminal includes speed detecting means for detecting the moving speed;
A map data request / acquisition section for requesting the map data of different types in accordance with the moving speed detected in the information distribution server, and acquires by the speed detecting means,
An auto scrolling means for displaying always place the current position by scrolling the map in the display means,
An operation section having the the automatic scroll means invalid and the portable navigation terminal map stop button for stopping the change of the type of map displayed on the display means at any time during the movement,
And a map change prohibition means for prohibiting the process for switching the type of map displayed on said display means in response to operation of the map stop button,
Wherein when the map stopping button is operated, the by the map change prohibition means, said prohibits the processing for switching to the speed corresponding to the moving speed detected by the detection means map displayed on said display means irrespective of the moving speed A portable navigation terminal characterized in that the display is continued without switching the map to another type of map. Display a speed detecting means, and a map data request / acquisition section sends the current position information obtained from the GPS system to an information distribution server, map information from the information distribution server, map and route by receiving route information a portable navigation terminal to be displayed on the device, and disables the automatic scroll means, the portable navigation terminal map stop button for stopping the change of the type of map displayed on the display means at any time during movement an operation unit having a map change prohibition means for prohibiting the process for switching the type of map displayed on said display means in response to operation of the map stop button, the computer constituting the portable navigation terminal equipped with ,
And the treatment you detect the moving speed of the portable navigation terminal,
Map data of different types in accordance with the moving speed it detects requests to the information distribution server, and the processing you get,
Always the processing that displays a predetermined position of the current position by scrolling the map in the display means,
Wherein when the map stopping button is operated, to switch prohibits the processing for switching to the map corresponding to the moving speed and detect, map being displayed on the display unit regardless of the moving speed on a map of other types Processing to continue displaying without
A program characterized by having executed. Before Symbol speed detecting means, the portable navigation terminal according to claim 1, characterized in that to detect the moving speed from the average traveling speed of the portable navigation terminal between two points obtained from the GPS system. The mobile navigation terminal includes an acceleration sensor, the speed detection means, the portable navigation terminal according to 請 Motomeko 1 you and detects the moving speed by integrating the output of the acceleration sensor.

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