JP2008203562A - Map display system, mobile terminal device, map scrolling method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent scrolling instruction from being continuously issued when a mobile terminal device having a scroll mode to scroll a map image in accordance with the inclination of the device main body is being set to an inclination scroll mode and left in an inclined state. <P>SOLUTION: The mobile terminal device 20 comprises: an inclination scroll mode setting means 210; a display means 212 for displaying a map; an inclination detecting means 204 for detecting inclination; an inclination displacement detecting means 205 for detecting the displacement of the inclination according to the detection output of the inclination detecting means 204; and a scroll requesting means 213 for outputting request for scrolling to scroll the map image displayed on a display means 212 according to the displacement of the inclination detected by the inclination displacement detecting means 205; and, further, a scroll restricting means 214 for restricting, when the inclination scroll mode is activated and the inclination displacement detecting means 205 detects the displacement of the inclination of the mobile terminal device 20 main body, the request for scrolling from the scroll requesting means 213. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to map scroll control in a mobile terminal device that receives and displays map data from an external server by communication, and in particular, based on the tilt detected by the tilt detection means provided in the mobile terminal device, A map display system, a portable terminal device, and a map scroll that provide a tilt scroll mode for scrolling the map displayed on the display means and suppress the map scroll when the tilt detected by the tilt detection means is in a predetermined state It is about the method.

  2. Description of the Related Art Conventionally, navigation devices and navigation systems that guide a user by searching for a route from a desired departure point to a destination using map data and road data are known. Such navigation devices and navigation systems are known. As a car navigation device that is installed in an automobile and guides the route to the driver, a communication type that uses a mobile phone as a navigation terminal to send a route search request to the route search server, receives the result, and receives route guidance Navigation systems have been put to practical use.

  In particular, the communication-type navigation system is a system that uses a mobile terminal such as a mobile phone as a navigation terminal, and is also used as a navigation system for pedestrians. As a navigation system for pedestrians, it is preferable to add a route guidance function including transportation, and in addition to searching and guidance for walking routes, the route search server accumulates routes and operation time data of transportation, There is also a navigation system having a function of guiding a route from a desired departure station to a desired destination station (boarding candidate train) in addition to searching for a walking route and guidance. There is also a traffic guidance system that receives and displays information such as routes, timetables of transportation facilities, and trains that can be boarded from an information distribution server without searching for walking routes.

  A general navigation device, a route search device and a route search method used in a communication navigation system are disclosed in, for example, the following Patent Document 1 (Japanese Patent Laid-Open No. 2001-165681). This navigation system is configured to send information on a departure point and a destination from a portable navigation terminal to an information distribution server, and the information distribution server searches and guides a route that matches a search condition from road network and traffic network data. Has been. As the search condition, there are means for moving from the departure place to the destination, for example, walking, automobile, combined use of railroad and walking, and the route is searched as one of the search conditions.

  The information distribution server has roads (routes) of map data as nodes and nodes as the positions of inflection points, links connecting the nodes as links, and cost information (distance and required time) of all links as a database. ing. Then, the information distribution server sequentially searches for a link from the departure node to the destination node with reference to the database, and traces the node and link with the smallest cost information of the link as a guide route. The shortest route can be guided to the portable navigation terminal. As such a route search method, a method called label determination method or Dijkstra method is used. Patent Document 1 also discloses a route search method using this Dijkstra method.

  In recent years, mobile terminals such as mobile phones are equipped with browsers and can access the Internet to receive desired information. In such a system, the user operates a mobile terminal, finds a desired site using a search engine provided in the server, downloads the content of the site, and browses the content with a browser. ing. The content includes information belonging to various categories, and includes information on stores and events, provision of railway timetables, and train transfer guidance.

  In providing information on stores and events, a user operates a mobile terminal to input a store or event category and an area to be searched for a search request. The server searches for stores and events that fall into the specified category and exist in the area, and the information is distributed to the map display terminal. In providing the timetable, when the user operates the mobile terminal to designate a route, the timetable of the route is presented on the screen of the display device of the mobile terminal. Further, in the transfer guidance, the recommended route is presented by the user specifying the departure place and the destination.

  In addition, connect to a map server on the Internet from a terminal device such as a personal computer or a mobile phone, and enter the desired location, facility, store address, name, telephone number, etc. to determine the location of the location, facility, or store. It is also possible to display a map image on a display device by downloading map data within a predetermined range.

  In the communication-type navigation system, map data for map display distributed from the map distribution server to a map display device as a terminal is configured as follows. That is, the map data stored in the map distribution server is composed of unit map data (mesh map data) divided into a mesh shape in a certain latitude range and longitude range. When distributing map data to the map display device, based on the position information of the map display device, the unit map adjacent in the vertical, horizontal, and diagonal directions is centered on the unit map including the position of the map display device. In total, nine unit map data are distributed. When the map display device moves and the unit map data is insufficient, the unit map data for the shortage is newly distributed.

  The map data for displaying the map image is generally composed of vector map data instead of bitmap data (raster map data) in order to suppress the amount of data during communication. The vector map data includes polygon data for displaying roads included in a map in mesh units in a state close to natural terrain, and road data expressing each road link as a vector. Road data expressed in vectors is used when drawing a guide route or route history on a map image. The current position of the map display device is drawn on the searched route and road data at the time of route guidance. The current position is calculated by satellite navigation using a GPS receiver provided in the map display device.

  A communication type navigation system using a mobile phone as a terminal device is mainly used for route guidance for pedestrians who travel on foot or by transportation, but pedestrians do not always move on foot, and taxis. It is preferable that a comprehensive route search can be performed including a section in which the vehicle moves using the road network data for the vehicle. Further, it is more preferable that the passenger who gets on the passenger seat can use the mobile phone and transmit the guidance route received from the server to the driver.

  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. 9, 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, in this navigation system, when a route search request including the position 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. The optimum route connecting the starting point to the destination is searched for, 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.

  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 a displayed map. In addition, these functions can be operated automatically or manually by selecting an automatic mode in which these functions are automatically operated and a manual mode in which these functions are operated by a user operation. 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 auto zoom, a map having an appropriate size corresponding to the moving speed of the navigation device is selected. In the manual zoom, a display map is selected based on the zoom amount instructed from the operation unit.

  Various techniques for detecting and utilizing the tilt and orientation of a mobile terminal device in processing of a display screen and an image in a mobile terminal device such as a mobile phone have been studied. For example, techniques for scrolling a display image based on the inclination of a mobile phone, performing input processing, and calculating a rotational displacement amount of a captured image are being studied.

  Such a portable terminal device is disclosed in the following Patent Document 3 (Japanese Patent Laid-Open No. 2002-341991) and Patent Document 4 (Japanese Patent Laid-Open No. 2004-163139). The information display device disclosed in Patent Document 3 performs scrolling and input operation of the display screen using the tilt of the device, and the rotation amount calculation device disclosed in Patent Document 4 is an imaging device. The rotation amount is obtained from the displacement amount of the photographed image, and is used as the inclination amount with respect to the initial posture.

  For example, the information display device disclosed in Patent Document 3 includes a tilt direction detection unit that detects the tilt direction of the device, and an inclination amount detection unit that detects the magnitude of the tilt of the device. The scroll direction of the information displayed on the display unit is determined according to the detected tilt direction, and the scroll speed of the information displayed on the display unit is determined according to the magnitude of the tilt detected by the tilt amount detection unit 2. Is to be determined.

JP 2001-165681 A (FIGS. 1 and 2) Japanese Patent Laying-Open No. 2003-214860 (FIG. 1) JP 2002-341991 A (FIG. 1) JP 2004-163139 A (FIGS. 1 and 2)

  Therefore, in a communication type navigation system that receives distribution of map information from a route search server, new display map data is obtained depending on the moving speed and / or current position of the mobile terminal device by operating the zoom function and scroll function. When it becomes necessary, it is necessary to receive map data from the route search server and display the map.

On the other hand, it is desirable for the user of the terminal device that the operation for scrolling is simple. In particular, in a navigation system in which a device such as a mobile phone is used as a mobile terminal device, the device is small and the number of operation buttons and input keys is small.
For this reason, the mobile terminal device is provided with posture detection means such as an acceleration sensor, and automatically detects the direction and amount of tilt of the mobile terminal device as in the information display device disclosed in Patent Document 3 above. It may be configured to scroll the displayed map image.

  However, in the case of a communication-type navigation system, if the mobile terminal device is left tilted, scroll operations are continuously performed. In a navigation system using a mobile phone as a mobile terminal device, a mobile phone navigation application receives map data from an external route search server. Accordingly, when scrolling is continuously instructed, there is a problem that map data is repeatedly downloaded from the route search server to the mobile terminal device.

  As a result, (1) a packet charge unintended for the user of the mobile terminal device occurs. (2) When such a state occurs simultaneously in a plurality of terminal devices, the processing load of the route search server increases or the traffic level of the communication line on the network increases. (3) When there is a restriction on the data communication amount of the mobile terminal device such as a mobile phone, there is a possibility that the use will be stopped. Various problems such as these occur, and there are problems on both the user side and the service provider side.

  The inventor of the present application has conducted various studies to solve the above-described problems, and as a result, scroll limiting means for prohibiting scroll processing in a portable terminal device having a tilt scroll mode for scrolling a map based on the displacement of the tilt of the device. The present invention has been completed by conceiving that the above-mentioned problems can be solved if the scroll process is prohibited when the inclination displacement is detected a predetermined number of times or more. .

  That is, the present invention aims to solve the above-described problems, and in a mobile terminal device having an inclined scroll mode for scrolling a map image according to the inclination of the apparatus body, the mobile terminal is set in the inclined scroll mode. An object of the present invention is to provide a navigation system in which scrolling is not continuously instructed when the device is left in an inclined state.

In order to solve the above-mentioned problem, the invention according to claim 1 of the present application is
In a map display system comprising: a mobile terminal device having a map scroll function for scrolling a map image displayed on a display means; and a map information distribution server for providing map data in accordance with a request from the mobile terminal device.
The portable terminal device has a tilt scroll mode for scrolling a map image in accordance with the tilt of the device body, a tilt scroll mode setting means for activating the tilt scroll mode, a display means for displaying a map, and a tilt detection An inclination detection means for detecting the displacement of the inclination based on the detection output of the inclination detection means, and a map image displayed on the display means in accordance with the inclination displacement detected by the inclination displacement detection means. Scroll request means for outputting a scroll request for scrolling, and
When the tilt scroll mode is activated and the tilt displacement detection means detects a tilt displacement of the mobile terminal device body, the tilt scroll mode further comprises a scroll limiting means for limiting a scroll request from the scroll request means. Map display system.

  The invention according to claim 2 of the present application is the map display system according to claim 1, wherein the inclination detecting means is an acceleration sensor, the inclination displacement detecting means calculates the direction of gravity acceleration from the output of the acceleration sensor, and It is detected as a displacement in the direction of acceleration.

  According to a third aspect of the present invention, in the map display system according to the first aspect, the tilt detecting means is an imaging means, and the tilt displacement detecting means is a rotation direction of an image based on a change in an image photographed by the imaging means. Is detected as a displacement.

  The invention according to claim 4 of the present application is the map display system according to any one of claims 1 to 3, wherein the scroll restriction means is a time during which the inclination displacement detection means detects the displacement of the inclination. When the value exceeds a predetermined value, the scroll request from the scroll request means is limited or the tilt scroll mode is canceled.

  The invention according to claim 5 of the present application is the map display system according to any one of claims 1 to 3, wherein the scroll limiting means detects the tilt displacement by the tilt displacement detecting means exceeding a predetermined number of times. In this case, the scroll request from the scroll request means is restricted or the tilt scroll mode is canceled.

The invention according to claim 6 of the present application is the map display system according to any one of claims 1 to 3, wherein the mobile terminal device scrolls the map image based on an operation of a key that indicates a scroll direction. A scroll mode, wherein the inclined scroll mode setting means comprises a specific key different from a key for instructing the scroll direction;
The scroll control means limits the scroll request from the scroll request means or cancels the tilt scroll mode when the operation of the specific key is not continued.

The invention according to claim 7 of the present application is
A mobile terminal device having a map scroll function for scrolling a map image displayed on the display means, and a map information distribution server that provides map data in accordance with a request from the mobile terminal device, are connected via a network and displayed on the display means. In a mobile terminal device having a map scroll function for scrolling the map image,
The portable terminal device has a tilt scroll mode for scrolling a map image in accordance with the tilt of the device body, a tilt scroll mode setting means for activating the tilt scroll mode, a display means for displaying a map, and a tilt detection An inclination detection means for detecting the displacement of the inclination based on the detection output of the inclination detection means, and a map image displayed on the display means in accordance with the inclination displacement detected by the inclination displacement detection means. Scroll request means for outputting a scroll request for scrolling, and
When the tilt scroll mode is activated and the tilt displacement detection means detects a tilt displacement of the mobile terminal device body, the tilt scroll mode further comprises a scroll limiting means for limiting a scroll request from the scroll request means. And

  According to an eighth aspect of the present invention, in the portable terminal device according to the seventh aspect, the tilt detecting means is an acceleration sensor, and the tilt displacement detecting means calculates the direction of gravitational acceleration from the output of the acceleration sensor and It is detected as a displacement in the direction of acceleration.

  According to a ninth aspect of the present invention, in the portable terminal device according to the seventh aspect, the tilt detecting means is an imaging means, and the tilt displacement detecting means is a rotation direction of an image based on a change in an image captured by the imaging means. Is detected as a displacement.

  The invention according to claim 10 of the present application is the portable terminal device according to any one of claims 7 to 9, wherein the scroll limiting means is a time during which the tilt displacement detecting means detects the tilt displacement. When the value exceeds a predetermined value, the scroll request from the scroll request means is limited or the tilt scroll mode is canceled.

  According to an eleventh aspect of the present invention, in the portable terminal device according to any one of the seventh to ninth aspects, the scroll limiting means detects the tilt displacement by the tilt displacement detecting means exceeding a predetermined number of times. In this case, the scroll request from the scroll request means is restricted or the tilt scroll mode is canceled.

According to a twelfth aspect of the present invention, in the portable terminal device according to any one of the seventh to ninth aspects, the portable terminal device scrolls a map image based on an operation of a key that indicates a scroll direction. A scroll mode, wherein the inclined scroll mode setting means comprises a specific key different from a key for instructing the scroll direction;
The scroll control means limits the scroll request from the scroll request means or cancels the tilt scroll mode when the operation of the specific key is not continued.

The invention according to claim 13 of the present application is
A mobile terminal device having a map scroll function for scrolling a map image displayed on the display means, and a map information distribution server that provides map data in accordance with a request from the mobile terminal device, are connected via a network and displayed on the display means. In a map scroll method using a mobile terminal device having a map scroll function for scrolling a map image,
The portable terminal device has a tilt scroll mode for scrolling a map image in accordance with the tilt of the device body, a tilt scroll mode setting means for activating the tilt scroll mode, a display means for displaying a map, and a tilt detection An inclination detection means for detecting the displacement of the inclination based on the detection output of the inclination detection means, and a map image displayed on the display means in accordance with the inclination displacement detected by the inclination displacement detection means. Scroll request means for outputting a scroll request for scrolling, and scroll restriction means,
A step of limiting the scroll request from the scroll request unit when the tilt scroll mode is activated and the tilt displacement detection unit detects a tilt displacement of the mobile terminal device body; Features.

  According to a fourteenth aspect of the present invention, in the map scroll method according to the thirteenth aspect, the inclination detecting means is an acceleration sensor, the inclination displacement detecting means calculates the direction of gravitational acceleration from the acceleration sensor output, and gravity The method further includes a step of detecting as a displacement in the direction of acceleration.

  The invention according to claim 15 of the present application is the map scrolling method according to claim 13, wherein the inclination detecting means is an imaging means, and the inclination displacement detecting means determines the rotation direction of the image from a change in the image taken by the imaging means. Is further detected as a displacement.

  According to a sixteenth aspect of the present invention, in the map scrolling method according to any one of the thirteenth to fifteenth aspects, the step of the scroll restricting means restricting a scroll request from the scroll requesting means includes the inclination. When the time during which the displacement detecting means detects the tilt displacement exceeds a predetermined value, it includes a process of limiting the scroll request from the scroll request means or canceling the tilt scroll mode.

  The invention according to claim 17 of the present application is the map scrolling method according to any one of claims 13 to 15, wherein the step of limiting the scroll request from the scroll request unit is the tilting step. When the displacement detection means detects a tilt displacement exceeding a predetermined number of times, it includes a process of limiting the scroll request from the scroll request means or canceling the tilt scroll mode.

The invention according to claim 18 of the present application is the map scrolling method according to any one of claims 13 to 15, wherein the mobile terminal device scrolls the map image based on an operation of a key that indicates a scroll direction. A scroll mode, wherein the inclined scroll mode setting means comprises a specific key different from a key for instructing the scroll direction;
The step of limiting the scroll request from the scroll request unit by the scroll control unit limits the scroll request from the scroll request unit or cancels the tilt scroll mode when the operation of the specific key is not continued. Including a process to perform.

In the invention according to claim 1, there is a tilt scroll mode for scrolling the map image according to the tilt of the apparatus body, the tilt scroll mode setting means for activating the tilt scroll mode, the display means for displaying the map, An inclination detection means for detecting inclination, an inclination displacement detection means for detecting displacement of the inclination based on a detection output of the inclination detection means, and displayed on the display means in accordance with the inclination displacement detected by the inclination displacement detection means Scroll request means for outputting a scroll request for scrolling the map image,
When the tilt scroll mode is activated, and the tilt displacement detection unit detects a tilt displacement of the mobile terminal device main body, it further includes a scroll limiting unit that limits a scroll request from the scroll request unit.

  According to such a configuration, in the tilt scroll mode, if the detection of the tilt displacement continues for a certain amount or more, the scroll request from the scroll request unit is limited or the tilt scroll mode is canceled, so that the use of the mobile terminal device It is possible to prevent packet charges unintended for the user from being generated. Further, there is no increase in processing load for map distribution in the route search server and the map information providing server when a large number of mobile terminal devices occur simultaneously. In addition, traffic on the communication line is not increased. Further, even when there is a restriction on the data communication amount of the mobile terminal device, it becomes possible to prevent the suspension of use.

In the invention according to claim 2, in the map display system according to claim 1, the inclination detecting means is an acceleration sensor, the inclination displacement detecting means calculates the direction of gravity acceleration from the output of the acceleration sensor, and Detect as orientation displacement.
According to such a configuration, it is possible to scroll the map image by detecting the tilt displacement by providing the mobile terminal device with the acceleration sensor.

According to a third aspect of the present invention, in the map display system according to the first aspect, the inclination detecting means is an imaging means, and the inclination displacement detecting means displaces the rotation direction of the image from a change in the image taken by the imaging means. Detect as.
According to such a configuration, it is possible to scroll the map image by detecting an inclination displacement by providing an imaging device such as a CCD camera in the portable terminal device.

  According to a fourth aspect of the present invention, in the map display system according to any one of the first to third aspects, the scroll limiting means has a predetermined time during which the tilt displacement detecting means detects the tilt displacement. Is exceeded, the scroll request from the scroll request means is limited or the tilt scroll mode is canceled.

  According to such a configuration, even if the portable terminal device is left in the tilt scroll mode, if the detection of the tilt displacement continues for a certain amount, the scroll request from the scroll request unit is limited or the tilt scroll mode is canceled. Therefore, packet charges unintended for the user of the mobile terminal device can be prevented from being generated. Further, there is no increase in processing load for map distribution in the route search server and the map information providing server when a large number of mobile terminal devices occur simultaneously. In addition, traffic on the communication line is not increased. Further, even when there is a restriction on the data communication amount of the mobile terminal device, it becomes possible to prevent the suspension of use.

  According to a fifth aspect of the present invention, in the map display system according to any one of the first to third aspects, the scroll limiting means, when the tilt displacement detecting means detects a tilt displacement exceeding a predetermined number of times, The scroll request from the scroll request means is limited or the tilt scroll mode is canceled.

  According to such a configuration, even if the portable terminal device is left in the tilt scroll mode, if the detection of the tilt displacement continues for a certain amount, the scroll request from the scroll request unit is limited or the tilt scroll mode is canceled. Therefore, packet charges unintended for the user of the mobile terminal device can be prevented from being generated. Further, there is no increase in processing load for map distribution in the route search server and the map information providing server when a large number of mobile terminal devices occur simultaneously. In addition, traffic on the communication line is not increased. Further, even when there is a restriction on the data communication amount of the mobile terminal device, it becomes possible to prevent the suspension of use.

According to a sixth aspect of the present invention, in the map display system according to any one of the first to third aspects, the mobile terminal device has a scroll mode in which the map image is scrolled based on an operation of a key for instructing a scroll direction. Further, the inclined scroll mode setting means comprises a specific key different from a key for instructing the scroll direction,
The scroll control means limits the scroll request from the scroll request means or cancels the tilt scroll mode when the operation of the specific key is not continued.

  According to such a configuration, unlike the scroll by the conventional cursor key operation, during the tilt scroll mode, only one specific key as the tilt scroll mode setting means needs to be pressed, and only the attitude of the device is changed. You can scroll the map. Therefore, it is not necessary to press the cross cursor key (scroll key) again for each direction. For this reason, the holdability of the portable terminal device is good, and there is no worry of dropping the portable terminal device accidentally when changing the scroll direction.

  In the inventions according to claims 7 to 12, it is possible to provide portable terminal devices constituting the map display system according to claims 1 to 6, respectively. According to the eighteenth aspect of the present invention, it is possible to provide a map scrolling method for realizing the mobile terminal device according to the seventh to twelfth aspects of the present invention.

  Hereinafter, specific examples of the present invention will be described in detail with reference to examples and drawings. However, the embodiment shown below exemplifies a map display system for embodying the technical idea of the present invention, and is not intended to specify the present invention as the map display system of this embodiment. However, the present invention is equally applicable to the map display system of other embodiments included in the scope of claims.

  In the following embodiments, a mobile phone is assumed to be a mobile terminal device, and a navigation system that performs route search, route guidance, and provision of map data will be described as a specific example. However, the present invention is limited to such an embodiment. Instead, the mobile terminal device may be a mobile terminal such as a mobile game machine or a mobile music player. In this specification, such mobile terminals are collectively referred to as portable terminal devices.

  FIG. 1 is a system configuration diagram showing a configuration of a navigation system 10 according to an embodiment of the present invention. As shown in FIG. 1, the navigation system 10 includes a mobile terminal device 20 and a route search server 30 that are connected via a network 12. In this navigation system 10, a mobile phone is used as the mobile terminal device 20 to perform route search, route guidance, and map data for automobiles and pedestrians. This is a usage method in which a user operating the mobile terminal device 20 rides on a passenger seat, receives route search and route guidance services using the moving means as an automobile, and the passenger on the passenger seat navigates the driver.

  The route search server 30 includes a map database 306 and a route search network database 307 for route search. The map data stored in the map database 306 is vector map data. Such map data in vector format requires a small amount of data for communication, and can add data for drawing (displaying) an object image such as an icon on the map image displayed on the display means. Therefore, it is most suitable for a communication type map display system like the present invention.

  In addition, as shown in FIG. 2, the map data is divided into map areas in predetermined latitude and longitude units, is composed of mesh unit map data M11 to M33, and is distributed to the mobile terminal device 20. The unit map data M21, M23, M12, M32, M11, M13, M31, M33 adjacent to the unit map data M22 including the current position PP of the mobile terminal device 20 in the vertical direction, the left-right direction, and the diagonal direction. A total of nine unit maps are distributed. When the map display terminal 20 moves and the map data is insufficient, the moving direction of the map display terminal 20 is determined, and the route search server 30 delivers the insufficient unit map data. The same applies when the mobile terminal device 20 designates a specific point or POI (Point of Interest) position to request distribution of map data.

  The route search network database 307 for route search stores road network data used when traveling by foot or by car, and traffic network data used when traveling together with walking and transportation. The configuration of road network data and traffic network data is the same as that used in a normal navigation system.

  The route search server 30 also includes a control unit 301, a communication unit 302, a route search unit 303, a distribution request storage unit 304, and a distribution data editing unit 305. Although not shown, the control means 301 is a microprocessor having a RAM, a ROM, and a processor, and controls the operation of each unit by a control program stored in the ROM.

  The communication unit 302 is an interface for communicating with the mobile terminal device 20 and various information providing servers via the network 12. The distribution data editing means 305 is for editing the result of route search or POI search or map data into data for distribution to the mobile terminal device 20. The route search server 30 can collect POI information and map information from various information distribution servers via the network 12 and update or expand the map data stored in the map database 306.

  The route search means 303 is a multi-modal route search engine and has a route search function using both walking and transportation. Such a route search engine is disclosed in, for example, Japanese Patent Laid-Open No. 2000-258184. A known so-called Dijkstra method is applied as a route search method, and route search conditions, map requests, POI search conditions, and the like are transmitted from the mobile terminal device 20 and stored in the distribution request storage means 304.

  On the other hand, as shown in FIG. 1, the mobile terminal device 20 includes a control unit 201, a communication unit 202, a GPS reception unit 203, a tilt detection unit 204, a tilt displacement detection unit 205, a map data request unit 206, and a map data storage unit 207. , Operation means 208, scroll key 209, tilt scroll mode setting means 210, display means 212, scroll request means 213, scroll restriction means 214, and the like. Although not shown, the control unit 201 is a microprocessor having a RAM, a ROM, and a processor, and controls the operation of each unit by a control program stored in the ROM.

  The operation means 208 is for operation / input including numeric keys, alphabet keys, cursor operation keys, other function keys, selection keys, scroll keys, and the like. Further, a desired menu is selected from a menu screen displayed on the display means 212, or various input operations are performed by operating keys. Therefore, the display unit 212 also functions as a part of the operation unit 208. The operation means 208 is also provided with operation means such as a cursor.

The GPS receiving unit 203 includes a GPS receiver, receives signals from a plurality of GPS satellites, and measures the position of the mobile terminal device 20 using latitude and longitude. A map request, a route search request, a POI search request, and the like set using the operation unit 208 are transmitted to the route search server 30 by the communication unit 202. The map data distributed from the route search server 30 is stored in the map data storage means 207.

  The display unit 212 includes a liquid crystal display unit and the like, and displays a map image based on the map data received from the route search server 30. In the map image, the current position measured by the GPS receiving unit 203 is drawn as a current position mark, and when the mobile terminal device 20 requests a route search, the route search server 30 specifies the location specified by the mobile terminal device 20. The optimum route (or a plurality of candidate routes) is searched for and distributed to the mobile terminal device 20. Then, the guide route distributed from the route search server 30 is drawn on the map image on the display means 212.

  The scroll key 209 is composed of a cross key or the like, and the map image displayed on the display means 212 can be scrolled up and down and left and right by operating the scroll key 209. If the map data stored in the map data storage unit 207 is insufficient due to scrolling, the map data request unit 206 requests the route search server 30 to distribute the map data for the shortage.

  FIG. 3 is a diagram showing the appearance of a mobile phone used as the mobile terminal device 20. As shown in FIG. 3, a map image is displayed on the display means 212 of the portable terminal device 20, and the current position mark 42 is displayed on the map image. The operation unit 208 is provided with a scroll key 209, and a specific key “5” is assigned as the tilt scroll mode setting unit 210 for setting the tilt scroll mode.

  The map scroll mode in the mobile terminal device 20 is, for example, manual scroll by default. In this case, the user operates the scroll key 209 up / down and left / right to scroll the map image in a desired direction. When the scroll key 209 is operated, the cursor 41 moves according to the operation amount of the scroll key 209. The cursor 41 and the current position mark 42 are displayed with a straight line.

  When the cursor 41 reaches the end of the display screen, the map image is scrolled so that the position of the cursor 41 is at the center. Such a map scrolling method is disclosed in, for example, Japanese Patent Application Laid-Open No. 2003-208095. According to this scrolling method, image scrolling is performed when the cursor 41 comes to the end of the display screen. Therefore, continuous image scrolling is not achieved, but the processing load of drawing control can be reduced, and processing capability can be reduced. This is a suitable method for the mobile terminal device 20 such as a mobile phone.

  As described above of the operation unit 208, the tilt scroll mode setting unit 210 is assigned a function to a specific key, for example, the numeric key “5”, and the mobile terminal device 20 is set to the tilt scroll mode by operating this key. Can be set. In the tilt scroll mode, when the mobile terminal device 20 is tilted, the map image displayed on the display unit 212 is scrolled based on the direction of displacement of the tilt.

  For example, if the mobile phone that is the mobile terminal device 20 is tilted so as to raise the display screen to the front from a standard posture for observing the display screen, the map image scrolls downward in the display screen. If the display screen is tilted so that the display screen is tilted forward from the normal posture, the map image scrolls upward in the display screen. In the present invention, instead of determining the scroll direction based on the absolute tilt direction of the display screen of the mobile phone, the scroll direction is determined according to the direction of the displacement of the tilt.

  FIG. 4 is a diagram illustrating a posture of a mobile phone used as the mobile terminal device 20. Usually, the portable terminal device 20 is held and displayed on the display unit 208 so that the vertical line (arrow F) of the display screen of the display unit 208 of the portable terminal device 20 matches the user's line-of-sight direction (arrow G). The observed map image is observed. That is, the map image is observed so that the display screen comes to the position of the eyes of the user in such a posture that the display screen of the mobile terminal device 20 is vertical.

  When the tilt scroll mode is set, the map image displayed on the display unit 212 can be scrolled so that the mobile terminal device 20 is tilted from the standard posture as shown in FIG. FIG. 5 is a diagram illustrating a posture in which the mobile terminal device 20 is inclined by an angle Θ in the visual field G direction. As shown in FIG. 5, the map image displayed on the display means 212 is scrolled upward on the screen if the portable terminal device 20 is tilted forward from the standard position (see FIG. 4) to the visual field (direction of the line of sight G). To do. Further, if the mobile terminal device 20 is tilted so that the display screen is raised in front, the map image scrolls downward in the screen.

  For this reason, the mobile terminal device 20 has an inclination detection means 204. The inclination detecting unit 204 is composed of, for example, an inclinometer composed of a triaxial acceleration sensor, and can measure (detect) the inclination of the display screen of the mobile terminal device 20. As described above, when the tilt scroll mode setting unit 210 is operated to shift to the tilt scroll mode, the tilt detection unit 204 stores the gravitational acceleration direction viewed from the mobile terminal device 20 at that time. Thereafter, the tilt detecting means 204 scrolls the map in accordance with the tilt displacement of the mobile terminal device 20. If the map data does not exist in the memory of the mobile phone, the map data is received from the server via the communication means.

  FIG. 6 is a diagram showing a concept of detecting the direction of gravitational acceleration from the output of the triaxial acceleration sensor. It is determined which of the three-axis accelerations detected by the three-axis acceleration sensor included in the tilt detection unit 204 is close to the vertical direction. In general, when the mobile terminal device 20 is walking, the acceleration in the vertical axis Z direction is larger than the acceleration in the Y axis and X axis (horizontal axis), so the axis direction in which the largest acceleration component is detected is vertical. It can be distinguished from the axial direction. Similarly, the vertical direction can be determined even when the user carrying the mobile terminal device 20 is on a transportation means such as a train.

That is, as shown in FIG. 6, the gravitational acceleration 35.28 [km / h / s] (= 9.8 [m / s ² ]) is always in the vertical direction (Z-axis direction in FIG. 6). On the other hand, since the railway has a very gentle slope, an acceleration of about 2.0 to 2.5 [km / h / s] is detected substantially on the horizontal plane (on the XY plane in FIG. 6). Based on this, it is utilized that the axial direction with the maximum acceleration component (Z-axis direction in FIG. 6) can be determined (estimated) as the vertical axis direction. It should be noted that a conventionally known tilt sensor (for example, see Japanese Patent Application Laid-Open No. 8-278137) is built in, and the tilt amount with respect to the vertical axis of the mobile terminal device 20 can be accurately calculated to discriminate the vertical axis and the horizontal plane. Is possible.

  Next, the tilt displacement detection unit 205 detects the tilt displacement (of the mobile terminal device 20) from the direction of the gravitational acceleration detected by the tilt detection unit 204 and the direction of the gravitational acceleration detected and stored when the tilt scroll mode is entered. The direction of inclination displacement) is detected. In response to this tilt displacement, the scroll request unit 213 outputs a request to scroll the map image to the display unit 212. If the map image is insufficient due to scrolling, the map data requesting means 206 requests the route search server 30 to distribute the map data for the shortage.

  Here, when the mobile terminal device 20 is set to the tilt scroll mode and is left in the posture in which the tilt displacement is detected (with the tilt), the tilt displacement detecting unit 205 continuously detects the tilt displacement. Then, the scroll request is generated and the map data is insufficient, and the map data distribution request is generated from the mobile terminal device 20 to the route search server 30 each time.

  Therefore, in the first embodiment, the scroll limiting unit 214 limits the scroll request from the scroll request unit 213. The scroll request is restricted in any of the following cases. First, when the time during which the tilt displacement detecting unit 205 detects the tilt displacement exceeds a predetermined value, the scroll request from the scroll request unit 213 is limited or a timer is entered when the tilt scroll mode is entered. When the timer continues for a predetermined time, the tilt scroll mode is canceled.

  Second, when the tilt displacement detecting unit 205 detects tilt displacement exceeding a predetermined number of times, the scroll request from the scroll request unit 213 is limited, or the tilt displacement detecting unit 205 is tilted instead of the predetermined time. When the process for detecting the displacement detects the tilt displacement exceeding a predetermined number of times, the tilt scroll mode is canceled.

  Thirdly, the tilt scroll mode is executed only when the key operation as the tilt scroll mode setting means 210 is not continued, that is, when the key as the tilt scroll mode setting means 210 is pressed for a long time. When no key operation is detected, the scroll request from the scroll request means 213 is restricted or the tilt scroll mode is canceled.

  As described above, in the tilt scroll mode, if the detection of the tilt displacement continues for a certain amount or more, the scroll request from the scroll request unit 213 is limited or the tilt scroll mode is canceled. It is possible to prevent packet charges from being generated. In addition, the processing load for map distribution in the route search server 30 when a large number of mobile terminal devices 20 are simultaneously generated does not increase. In addition, traffic on the communication line is not increased. Further, even when there is a restriction on the data communication amount of the mobile terminal device 20, it is possible to prevent the use from being stopped.

  In particular, according to the third method, unlike the conventional scrolling by the cursor key operation, during the tilt scroll mode, only one specific key as the tilt scroll mode setting means 210, for example, the “5” key is pressed. The map can be scrolled simply by changing the attitude of the device. Therefore, according to the present invention, it is not necessary to press the cross cursor key (scroll key) again for each direction. For this reason, the holdability of the portable terminal device 20 is good, and there is no worry that the portable terminal device 20 is accidentally dropped when the scroll direction is changed.

  The route search by the route search means 303 is performed as follows. For example, when the road is composed of roads A, B, and C as shown in FIG. 7, the end points, intersections, and bending points of the roads A, B, and C are used as nodes, and the roads connecting the nodes are directed links. Link cost data with node data (node latitude / longitude), link data (link number) and link cost of each link (link distance or time required to travel the link) as data Composed.

  That is, in FIG. 7, Nn (◯ mark) and Nm (◎ mark) indicate nodes, and Nm (◎ mark) indicates a road intersection. Directional links connecting the nodes are indicated by arrow lines (solid line, dotted line, two-dot chain line). As for the links, there are links facing in the upward and downward directions of the road, but in FIG. 7, only the links in the direction of the arrows are shown for the sake of simplicity.

  When performing route search using such road network data as a search database, follow links linked from the departure node to the destination node, accumulate the link cost, and minimize the accumulated link cost. Search for and guide. That is, in FIG. 7, when a route search is performed with the departure point as the node AX and the destination as the node CY, the road travels from the node AX along the road A, turns right at the second intersection, enters the road C, and reaches the node CY. The link cost is accumulated sequentially, and a route that minimizes the accumulated link cost is searched for and guided.

  Although other routes from the node AX to the node CY are not shown in FIG. 7, there are actually other such routes, so that a plurality of routes that can be reached from the node AX to the node CY are displayed. A search is performed in the same manner, and a route with the lowest link cost is determined as the optimum route. This method is performed by, for example, a known method called the Dijkstra method.

  On the other hand, the traffic network data for route search of the transportation system is configured as follows. For example, as shown in FIG. 8, in the case of traffic routes A, B, and C, each station (each airport on an aircraft route) provided on each traffic route A, B, and C is a node, and the nodes are connected. A section is represented by a directional link, and node data (latitude / longitude) and link data (link number) are network data. In FIG. 8, Nn (○ mark) and Nm (◎ mark) indicate nodes, Nm (◎ mark) indicates a transit point (such as a transfer station) on a traffic route, and a directional link connecting each node. It is indicated by an arrow line (solid line, dotted line, two-dot chain line). As for the links, there are links facing in the upward and downward directions of the traffic route, but in FIG. 8, only the links in the direction of the arrows are shown for the sake of simplicity.

  However, the traffic network basically has a different link cost compared to the road network. In other words, in the road network, the link cost is fixed and static, but in the traffic network, as shown in FIG. 8, trains and airplanes (hereinafter referred to as individual trains and airplanes) that operate the traffic route. A plurality of means of transportation). The time of departure from one node and the time of arrival at the next node are determined for each means of transportation (specified by timetable data and operation data), and individual routes do not necessarily link to adjacent nodes. There is a case. This is the case, for example, with express trains and trains that stop at each station. In such a case, a plurality of different links exist on the same traffic route, and the required time between nodes may differ depending on the transportation means.

  In the transportation network illustrated in FIG. 8, a plurality of transportation means (routes) Aa to Ac... Exist on the same link of the transportation route A, and a plurality of transportation means (routes) Ca to Cc. Will do. Therefore, unlike a simple road network, the transportation network of a transportation facility has a data amount proportional to the total number of transportation means (routes such as individual airplanes and trains). For this reason, the data of the traffic network becomes a huge amount of data compared to the data amount of the road network. Accordingly, much time is required for route search accordingly.

In order to search for a route from a certain departure point to a certain destination using such traffic network data, all the means of transportation that can be used (ride) when arriving from the departure point to the destination are searched. It is necessary to specify the means of transportation that matches the search conditions.
For example, in FIG. 8, when a specific departure time is designated with the departure point as the node AX of the traffic route A and a route search is performed with the node CY of the traffic route C as the destination, the route operates on the traffic route A. Of the transportation means Aa to Ac..., All transportation means after the departure time are sequentially selected as the departure route. Based on the arrival time at the transit node on the transit route C, among all the transit means Ca to Cc... Operating on the transit route C, all combinations of transit means after the time that can be boarded at the transit node. The total time required for each route, the number of transfers, and the like are guided.

  In the first embodiment, the case where the tilt detecting unit 204 is configured by a triaxial acceleration sensor has been described. However, in the present invention, the tilt detecting unit 204 is not limited to the first embodiment, and is substantially a mobile terminal device. It suffices to have means capable of detecting 20 inclinations. For example, if the mobile terminal device 20 includes an imaging unit such as a CCD camera, image data captured by the imaging unit can be used.

  That is, when the tilt scroll mode is set, the image pickup means constituting the tilt detection means 204 takes a peripheral image and stores the image data at that time. And when a user wants to scroll a map image, the direction of the portable terminal device 20 is inclined according to the direction which wants to scroll, and a surrounding image is image | photographed with an imaging means. The tilt displacement detector 205 detects the direction of the displacement from the initially stored captured image and the captured image captured by tilting the mobile terminal device 20. As a method for detecting the direction of displacement (direction of rotation) from the captured image data, the technique disclosed in Patent Document 4 may be applied.

  The direction of displacement detected in the present embodiment does not have to be strictly rotating. Including the case where the mobile terminal device 20 is moved in parallel, if the image is moving for each shooting frame, it is assumed that there is an inclination. I do. The imaging means may be a camera for photographing a peripheral image or a camera for photographing itself (for example, a camera for a video phone). Also in this case, when the specific key of the portable terminal device 20, for example, the “5” key is pressed, the tilt scroll mode is entered, the first image is stored, and the tilt scroll is performed by the displacement of the image thereafter.

  The present invention is applicable to any type of portable terminal device as long as it is a portable terminal device (map display device) that detects the tilt of the device and scrolls the map.

1 is a system configuration diagram showing a configuration of a navigation system 10 according to an embodiment of the present invention. It is a schematic diagram which shows the structure of map data. It is a figure which shows the external appearance of the mobile telephone used as a portable terminal device. It is a figure which shows the standard attitude | position which observes the display screen of the mobile telephone used as a portable terminal device. It is a figure which shows the attitude | position which inclined the portable terminal device by angle (theta) to the visual field direction. It is a figure which shows the concept which detects the direction of gravity acceleration from the output of a triaxial acceleration sensor. It is a schematic diagram for demonstrating the concept of the road network data for a route search. It is a schematic diagram for demonstrating the concept of the traffic network data for the route search using a transportation system. 1 is a system configuration diagram showing a general configuration of a communication type navigation system.

Explanation of symbols

10 .... Map display system (navigation system)
12 .... Network 20 ... Mobile terminal device 201 ... Control means 202 ... Communication means 203 ... GPS reception means 204 ... Inclination detection means 205 ... Inclination displacement detection means 206 ... Map data requesting means 207 ... Map data storage means 208 ... Operation means 209 ... Scroll key 210 ... Inclined scroll mode setting means 212 ... Display means 213 ... Scroll request means 214 ..Scroll limit means 30 ... Map information distribution server (route search server)
301 ... Control means 302 ... Communication means 303 ... Route search means 304 ... Distribution request storage means 305 ... Distribution data editing means 306 ... Map database 307 ... Route search network database

Claims (18)

In a map display system comprising: a mobile terminal device having a map scroll function for scrolling a map image displayed on a display means; and a map information distribution server for providing map data in accordance with a request from the mobile terminal device.
The portable terminal device has a tilt scroll mode for scrolling a map image in accordance with the tilt of the device body, a tilt scroll mode setting means for activating the tilt scroll mode, a display means for displaying a map, and a tilt detection An inclination detection means for detecting the displacement of the inclination based on the detection output of the inclination detection means, and a map image displayed on the display means in accordance with the inclination displacement detected by the inclination displacement detection means. Scroll request means for outputting a scroll request for scrolling, and
When the tilt scroll mode is activated and the tilt displacement detection means detects a tilt displacement of the mobile terminal device body, the tilt scroll mode further comprises a scroll limiting means for limiting a scroll request from the scroll request means. Map display system.   2. The map according to claim 1, wherein the tilt detection unit is an acceleration sensor, and the tilt displacement detection unit calculates a direction of gravitational acceleration from the output of the acceleration sensor and detects it as a displacement of the direction of gravitational acceleration. Display system.   The map display system according to claim 1, wherein the inclination detection unit is an imaging unit, and the inclination displacement detection unit detects a rotation direction of the image as a displacement from a change in an image captured by the imaging unit.   The scroll limiting means limits the scroll request from the scroll request means or cancels the tilt scroll mode when the time during which the tilt displacement detection means detects the tilt displacement exceeds a predetermined value. The map display system according to any one of claims 1 to 3, characterized by:   The scroll limiting means limits the scroll request from the scroll request means or cancels the tilt scroll mode when the tilt displacement detection means detects a tilt displacement exceeding a predetermined number of times. The map display system according to any one of claims 1 to 3. The portable terminal device further has a scroll mode for scrolling a map image based on an operation of a key for instructing a scroll direction, and the inclined scroll mode setting means is configured by a specific key different from the key for instructing the scroll direction. ,
4. The scroll control device according to claim 1, wherein when the operation of the specific key is not continued, the scroll control device limits a scroll request from the scroll request device or cancels the tilt scroll mode. The map display system according to any one of the above. A mobile terminal device having a map scroll function for scrolling a map image displayed on the display means, and a map information distribution server that provides map data in accordance with a request from the mobile terminal device, are connected via a network and displayed on the display means. In a mobile terminal device having a map scroll function for scrolling the map image,
The portable terminal device has a tilt scroll mode for scrolling a map image in accordance with the tilt of the device body, a tilt scroll mode setting means for activating the tilt scroll mode, a display means for displaying a map, and a tilt detection An inclination detection means for detecting the displacement of the inclination based on the detection output of the inclination detection means, and a map image displayed on the display means in accordance with the inclination displacement detected by the inclination displacement detection means. Scroll request means for outputting a scroll request for scrolling, and
When the tilt scroll mode is activated and the tilt displacement detection means detects a tilt displacement of the mobile terminal device body, the tilt scroll mode further comprises a scroll limiting means for limiting a scroll request from the scroll request means. A portable terminal device.   8. The mobile phone according to claim 7, wherein the tilt detection unit is an acceleration sensor, and the tilt displacement detection unit calculates a direction of gravitational acceleration from the output of the acceleration sensor and detects it as a displacement of the direction of gravitational acceleration. Terminal device.   8. The portable terminal device according to claim 7, wherein the tilt detecting unit is an image capturing unit, and the tilt displacement detecting unit detects a rotation direction of the image as a displacement from a change in an image captured by the image capturing unit.   The scroll limiting means limits the scroll request from the scroll request means or cancels the tilt scroll mode when the time during which the tilt displacement detection means detects the tilt displacement exceeds a predetermined value. The mobile terminal device according to claim 7, wherein the mobile terminal device is a mobile terminal device.   The scroll limiting means limits the scroll request from the scroll request means or cancels the tilt scroll mode when the tilt displacement detection means detects a tilt displacement exceeding a predetermined number of times. The mobile terminal device according to any one of claims 7 to 9. The portable terminal device further has a scroll mode for scrolling a map image based on an operation of a key for instructing a scroll direction, and the inclined scroll mode setting means is configured by a specific key different from the key for instructing the scroll direction. ,
10. The scroll control unit according to claim 7, wherein when the operation of the specific key is not continued, the scroll request from the scroll request unit is limited or the tilt scroll mode is canceled. The mobile terminal device according to any one of the above. A mobile terminal device having a map scroll function for scrolling a map image displayed on the display means, and a map information distribution server that provides map data in accordance with a request from the mobile terminal device, are connected via a network and displayed on the display means. In a map scroll method using a mobile terminal device having a map scroll function for scrolling a map image,
The portable terminal device has a tilt scroll mode for scrolling a map image in accordance with the tilt of the device body, a tilt scroll mode setting means for activating the tilt scroll mode, a display means for displaying a map, and a tilt detection An inclination detection means for detecting the displacement of the inclination based on the detection output of the inclination detection means, and a map image displayed on the display means in accordance with the inclination displacement detected by the inclination displacement detection means. Scroll request means for outputting a scroll request for scrolling, and scroll restriction means,
A step of limiting the scroll request from the scroll request unit when the tilt scroll mode is activated and the tilt displacement detection unit detects a tilt displacement of the mobile terminal device body; A featured map scrolling method.   The tilt detection means is an acceleration sensor, and the tilt displacement detection means further has a step of calculating a direction of gravity acceleration from the output of the acceleration sensor and detecting the displacement as a displacement of the direction of gravity acceleration. The map scroll method as described in.   14. The map according to claim 13, wherein the inclination detecting means is an imaging means, and the inclination displacement detecting means further comprises a step of detecting a rotation direction of the image as a displacement from a change in the image taken by the imaging means. Scroll method.   The step of limiting the scroll request from the scroll requesting means by the scroll limiting means includes a scroll request from the scroll requesting means when the time during which the tilt displacement detecting means detects the tilt displacement exceeds a predetermined value. The map scroll method according to any one of claims 13 to 15, further comprising: a process of restricting or canceling the tilt scroll mode.   The step of limiting the scroll request from the scroll request unit by the scroll limiting unit limits the scroll request from the scroll request unit when the tilt displacement detection unit detects a tilt displacement exceeding a predetermined number of times, or The map scroll method according to claim 13, further comprising a process of canceling the tilt scroll mode. The portable terminal device further has a scroll mode for scrolling a map image based on an operation of a key for instructing a scroll direction, and the inclined scroll mode setting means is configured by a specific key different from the key for instructing the scroll direction. ,
The step of limiting the scroll request from the scroll request unit by the scroll control unit limits the scroll request from the scroll request unit or cancels the tilt scroll mode when the operation of the specific key is not continued. The map scroll method according to claim 13, further comprising:

Images