JP2005308661A - Navigation system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the problem that maps with the same reduction scale and the same contents are displayed on two screens, respectively by the instruction of a user, in a navigation system for displaying maps on the two screens respectively. <P>SOLUTION: The navigation system comprises a two-screen map display section 22 having a map display section 23 of a first screen and a map display section of a second screen for displaying a map screen for instructing reduction scale that the reduction scale can be instructed by the user and other map screen; and one-screen map display section 25. The system detects the problem wherein a map for instructing the reduction scale and other map are displayed with the same reduction scale and the same content by the instruction of the user, by a section 35 for detecting the display of the same maps; instructs a section 30 for selecting the content of the display map by a section 37 for instructing the change of a display map, after a lapse of a predetermined time; and then displays the map on one screen, a map with the next scale, or another map with content different from other side. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a navigation device mounted on a vehicle or the like, and in particular, when two screens are displayed on a monitor, when the same screen is displayed by a user's selection, different map screens can be automatically displayed. The present invention relates to a navigation device.

  In a general navigation apparatus mounted on a vehicle or the like, a map / information data storage such as a CD-ROM, a DVD-ROM, a hard disk, etc., which stores map data for drawing a map and facility information data for searching for a facility, etc. A vehicle, a data capture device that captures data from the map / information data storage medium, a monitor that displays a map, etc., a self-contained navigation device that uses a GPS receiver, a mileage sensor, a gyroscope, etc. It has a vehicle position detection device that detects the position and the direction of travel, fetches map data including the current position of the vehicle from a map / information data storage medium, and monitors a map image around the vehicle position based on this map data The vehicle position mark is superimposed on the monitor screen, and the map image is scrolled as the vehicle moves. Le displayed, or moving the fixed vehicle position mark a map image on a screen, so that seen whether the vehicle is traveling where the current at a glance.

  Map data stored in a map / information data storage medium such as a CD-ROM, DVD-ROM, or hard disk is divided into longitude and latitude widths of appropriate sizes according to various scale levels. A road or the like is stored as a coordinate set of nodes expressed by longitude and latitude. A road is composed of a combination of two or more nodes, and map data displays a road layer consisting of a road list, a node table, an intersection configuration node list, etc., and roads, buildings, facilities, parks, rivers, etc. on the map screen. Map data such as a background layer, and information data for displaying characters, map symbols, etc., such as administrative division names such as municipalities, road names, intersection names, and facility names.

  In addition, this navigation device has a route guidance function for allowing a user to easily travel on a road toward a desired destination or waypoint (hereinafter referred to as “destination”) without making a mistake. Yes. According to this route guidance function, a destination is set by various means, and an appropriate route is calculated and presented in consideration of various conditions among routes connecting these points from the departure point to the destination. It has become. Also, the route selected by the user is stored as a guide route, and while driving, the guide route is drawn on the map image with a different color from other routes and displayed on the screen. When approaching an intersection where the course of course should be changed within a certain distance, the intersection is enlarged and displayed on the screen by drawing an arrow indicating the direction in which the course should be changed, or a right or left turn is guided by voice. In this way, the user can be guided to the destination.

Furthermore, in recent navigation devices, the monitor screen is enlarged and widened, one monitor screen is divided into two screens, a wide area map is displayed on the first screen on one side, and the current location is displayed on the second screen on the other side. Various information can be displayed on the two screens in various manners such as displaying a detailed map of the periphery. In such a navigation device capable of displaying two screens on the monitor, it is meaningless to display the same map on the two screens when switching from the one-screen display state to the two-screen display. In order to prevent the map from being displayed, it has been proposed to display the heading-up on the first screen and to display the north-up display on the second screen, which is different in scale from the display on the first screen ( Patent Document 1).
JP-A-11-37768

  When displaying two map screens on the monitor as described above, the same map screen is not displayed on both screens except when switching from the one-screen display to the two-screen display as described above. While the screen is being displayed, the map screen on one side can be arbitrarily set by the user. When a two-screen map is displayed at a different scale at first, Depending on the scale change instruction, the same scale as the map displayed with the scale being fixed may be selected and displayed. As a result, both screens may display the same map screen.

  Even in such a case, in a navigation device having a function of displaying two map screens on the monitor, it is meaningless to display the same map screen on both screens, but no countermeasure has been taken. .

  Therefore, according to the present invention, in a navigation device that displays a map on two screens on a monitor, when the scale of the map on one side is changed by the user to be the same as the scale of the map on the other side, the same map screen is displayed. The purpose is not to.

  In the navigation device according to the present invention, a scale instruction map screen for displaying a map that can be instructed by a user, a two-screen map display means for displaying another map screen, and the scale instruction map and the other map are the same. The same map display detecting means for detecting that the same map is displayed at a reduced scale, and one screen for displaying the map on one screen when the same map display detecting means detects that the same map is displayed. And a map display means.

  In another navigation device according to the present invention, in the navigation device, the one-screen map display means detects the same map display on the two screens after the predetermined map has been detected. The map is displayed on one screen.

  Another navigation apparatus according to the present invention includes a scale instruction map screen for displaying a map that can be instructed by a user, a two-screen map display means for displaying another map screen, the scale instruction map, and other maps. When the same map display detecting means for detecting that the map is displayed at the same scale and the same content is displayed, and when the same map display detecting means detects that the same map is displayed, the map is displayed on the map screen on one side. A display map changing means for displaying a map having a content different from that of the side is provided.

  According to another navigation device of the present invention, in the navigation device, when the display map change unit detects that the same map is displayed by the same map display detection unit, the user follows the scale change instruction by the user. It is characterized in that it is changed to a scale map and displayed.

  In another navigation device according to the present invention, in the navigation device, when the display map changing unit detects that the same map is displayed by the same map display detection unit, the display format of the map on one side is changed. It is characterized by being displayed in a different format from the side.

  The present invention is configured as described above so that it can be divided into two screens to display a map on each screen, and is used in a navigation device that displays a map of a scale instructed by a user on one screen. When the scale is changed according to the user's instruction, when a map with the same scale and the same content as another map is displayed, one-screen display is performed, or the display content of the map screen on one side is displayed differently from the other side. By doing so, it is possible to prevent meaningless display of displaying maps of the same content at the same scale on two screens.

  In a navigation device that displays a map on each of two screens, a scale instruction that displays a map that can be instructed by a user in order to prevent the same scale and the same content from being displayed on the two screens by the user's scale instruction. A two-screen map display means for displaying a map screen and another map screen; an identical map display detection means for detecting that the scale-indicating map and the other map are displayed at the same scale and the same map is displayed; When the same map display detecting means detects that the same map is displayed, the same map display detecting means for displaying the map on a single screen, or the same map display detecting means displays the same map. When this is detected, a display map changing means for displaying a map having contents different from those on the other side on the map screen on one side is provided.

  Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a functional block diagram of a navigation apparatus mainly showing a map image forming function according to the present invention, and shows various modes of the present invention. In addition, each function part in the figure can be paraphrased as means for performing each function.

  In the navigation apparatus shown in FIG. 1, like the conventional system, the system control unit 20 includes a ROM that records software for comprehensively performing various predetermined functions, a CPU for processing the software, and the like. It is equipped and controls each functional unit connected to it. In the illustrated navigation apparatus, a vehicle position detection unit 3 is connected to the system control unit 20 and position data of the GPS receiver 1 is input, and a travel distance / orientation detection unit using a vehicle speed sensor or an angle sensor as required. By inputting the movement data of the vehicle from No. 2, the current position of the vehicle is accurately detected.

  In the instruction signal input unit 6, an instruction signal from a user such as a remote controller is input in the navigation device, and an instruction to change the scale of the display map, which will be described in detail later, can be input. Further, a signal of the voice recognition unit 5 that inputs a user instruction signal by a process of recognizing the user's voice as necessary is also input to the instruction signal input unit 6.

  The data fetching unit 8 fetches necessary map data and facility information from a map / information data recording medium 7 such as a DVD-ROM, CD-ROM, or hard disk, and the data recording medium is like a hard disk. When data can be easily written, data can be input to the data recording medium so that data imported from outside or data processed by other functional units can be read and used later. I have to. In particular, in the present invention, a map of an instructed point is output at a predetermined scale, and data such as right / left turn guidance can be output as necessary.

  In the guidance route calculation unit 9, the current location of the vehicle detected by the vehicle position detection unit 3 is fetched, and the phone number is further input by scrolling the map by operating the cursor displayed on the screen or by inputting an address. The destination set by various methods such as the above is taken in, and the optimum guide route is calculated and presented under various conditions such as the shortest required time, the shortest distance, and the general road priority. In addition, the guidance route guidance unit 10 performs guidance so that the vehicle can safely reach the destination according to the guidance route calculated by the guidance route calculation unit 9 and selected and designated by the user. In addition, an audio output unit 12 that outputs various sounds including various guidance from the speaker 12 is provided, and an image output unit 14 that displays various information in addition to a map as described later is provided on the monitor 13.

  In the map image forming unit 21 that performs the main function of the present invention in FIG. 1, the monitor 13 is divided into two screens, and a two-screen map display unit 22 that can display a map screen on each screen, and two monitors 13. And a one-screen map table time unit 25 that displays one map on one entire screen without dividing the screen. Whether to operate the two-screen map display unit 22 or the one-screen map display unit 25 is automatically determined by the user's instruction by the 1 · 2 screen display selection unit 26 or as described later. So that you can choose.

  The two-screen map display unit 22 includes a first-screen map display unit 23 that displays a map of the first screen that is one of the screens divided into two, and a map display of the second screen that is the other-side screen. And a second screen map display unit 24 for performing a map display in accordance with various selection instructions described later.

  In the display ratio selection unit 27, when the screen of the monitor 13 is divided into two, the division ratio is divided into 1/2 and 1/2, or divided into 2/3 and 1/3. Alternatively, it can be divided in various manners according to user instructions. In addition, the display screen selection unit 28 can display a specific map image selected on either the first screen or the second screen as set in advance or by an instruction to the user. Yes.

  The map display content selection unit 30 displays the map displayed on each screen for the first screen and the second screen of the two-screen map display unit 22 and for one map screen displayed by the one-screen map display unit 25. The contents are selected in advance or in accordance with a user instruction, and the display map scale selection unit 31 therein selects the scale of the map to be displayed on each screen. Further, the display area selection unit 32 selects the display map scale so that the display area of the map displayed on each screen can be displayed at the center of the vehicle position or the area where the vehicle and the destination are entered can be displayed on the screen. The display area is selected together with the selection of the scale by the unit 36.

  In the map display format selection unit 33 in the map display content selection unit 30, a north-up display for displaying the map to be displayed on each screen so that the upper side of the screen is always north, and the upper side of the screen is always in front of the traveling direction of the vehicle. Display formats such as a heading-up display that rotates and displays the map as the vehicle progresses, a 3D display that displays the facilities in the map in three dimensions, a bird's-eye view display that displays the map from the top of the vehicle, etc. select.

  In the display selection unit 34, a facility detail display that displays information such as a facility in detail on the same scale map, a VICS display that displays VICS information, a guidance route display that displays a guidance route in the map, and a vehicle in the map A display format such as a travel trajectory display for displaying the travel trajectory, a highway information display for displaying information such as a service area in front of the currently traveling road while driving on an expressway, and the like is selected.

  In the same map display detection unit 35, the display state of the two-screen map display unit 22 is detected and displayed by the map displayed by the first screen map display unit 23 and the second screen map display unit 24. It is detected that a map having the same scale and the same content is displayed. In the elapsed time measuring unit 36, when the same map display detecting unit 35 detects that the same map is displayed on the first screen and the second screen at the same scale, the signal is input and detected. Measure the elapsed time since.

  The elapsed time measurement unit 36 outputs the signal to the 1.2 screen display selection unit 26 when a preset time such as 3 seconds elapses, and changes from the currently displayed 2 screen display to the 1 screen display. It can be switched. Further, the signal from the elapsed time measuring unit 36 is output to the display map change instruction unit 37, and the map display content is changed from the current state to a predetermined display content determined in advance on at least one map display screen. I can do it. However, if the same map display detection unit 35 detects that the same map is displayed at the same scale on both screens without operating the elapsed time measurement unit 36 depending on the setting, the display map change instruction unit 37 immediately By outputting a signal and selecting various map display contents as described later, it can be changed and displayed.

  The display content to be changed at this time is changed to a predetermined map scale by the display map scale selection unit 31, or changed from the vehicle position center to a map including the vehicle position and destination by the display area selection unit 32, or a map The display format selection unit 33 selects a display format such as north-up display, heading-up display, 3D display, or bird's-eye view display, and changes the display. Further, the display selection unit 34 changes to various displays such as facility detail display, VICS display, guidance route display, travel locus display, and highway information display.

  In the present invention composed of the functional blocks as described above, the first embodiment can be operated according to the operation flow shown in FIG. 2, for example. The operation flow shown in FIG. 2 will be described below based on the functional block diagram of FIG. 1 and the monitor display example of FIG. In the example of the two-screen display process of the map shown in FIG. 2, the two-screen display of the map is first selected by the user (step S1), thereby performing the two-screen initial display process of the map preset on the monitor. (Step S2). In this operation, the instruction signal input unit 6 in FIG. 1 is instructed by the user to display a two-screen map from the remote controller 4 or the like, and the one-two-screen display selection unit 26 in the map image forming unit 21 operates the two-screen map display unit 22 In accordance with the two-screen initial display process set in advance by the map display content selection unit 30, the display map scale selection 31, display area selection 32, north up, etc. for the first screen and the second screen, respectively. Map display format selection 33, and display selection 34 such as facility detail display.

  In accordance with these selections, the data capture unit 8 captures desired data from the map / information data recording medium 7 such as a DVD-ROM, and the screen division set by the display ratio selection unit 27 in the two-screen map display unit 22. The display screen selection unit 28 selects which map is to be displayed on which of the two screens, and the first screen map display unit 23 captures the map based on the selected map display content. The data is processed, and for example, a process for displaying the map on the first screen as the right screen is performed. In the 2nd screen map display part 24, the map display process for displaying on the 2nd screen which is a left screen toward another screen is performed. Of the two screens, for example, a first screen set in advance is a scale-change map screen that allows the user to arbitrarily change the display scale, and the second screen is a scale-fixed map screen. It should be noted that, on the contrary, the second screen may be a scale-change map screen, and the first screen may be a scale-fixed map screen.

  After the two-screen display process as described above is performed, it is determined whether or not the map to be displayed on the scale-change map screen is a map having the same scale and the same content as the map of the scale-fixed map screen. This determination is performed in the same map display detection unit 35 in FIG. Normally, in the initial display of the two-screen display, for example, as shown in FIG. 3A, the second screen, which is a fixed scale map screen, is a scale change map screen when a map on the wide area side is displayed. Since the first screen is often located on the driver side, a detailed map that directly affects the current driving is displayed. For this reason, at least the scales of the maps displayed on the screens are different.

  In the initial display process of the two map screens, the map display as described above is often performed. As a result, the map on the scale change map screen is not the same scale and the same map as the map on the fixed scale map screen in step S3. In step S7, the fixed scale map is displayed at the set scale, and the scale change map is displayed at the designated scale. Subsequently, it is determined whether or not the user has instructed to change the scale of the display map (step S8). When the instruction to change the scale has not been issued, the operation of step S7 is continued and the map is updated according to the movement of the vehicle. While displaying a predetermined map on both screens.

  Thereafter, when the user wants to display a map of a wider area on the first screen on which the detailed map is displayed, the user operates the remote controller 4 in FIG. At this time, since it is determined in step S8 whether or not the scale change instruction for the display map has been issued, it is determined that the scale change instruction has been issued. It is determined whether or not the map has the same scale and the same content as the map on the fixed scale map screen. In this determination, if it is determined that the map on the scale change map screen is not the same scale and the same content as the map on the fixed scale map screen, the process proceeds to step S7 as described above, and the operation is repeated.

  In the discrimination in the previous step S3, or in the discrimination in step S3 after the user again instructs the display map to change the scale in step S8, the map on the scale change map screen is the same as the map on the fixed scale map screen. When it is determined that the map has the same content at a reduced scale, that is, for example, as shown in FIG. 3 (b), the user has instructed to change the scale of the map on the right screen from the display state to the wide area side. When the maps having the same scale and the same content are displayed, it is determined that the maps displayed on both screens are the same map.

  Next, after displaying the same map, it is determined whether or not a predetermined time has elapsed (step S4). When the same map display detection unit 35 in FIG. 1 determines that the same map is displayed on both screens, this determination is performed by measuring the elapsed time measuring unit 36 after the signal is input. . When the elapsed time measuring unit 36 detects that a predetermined time, such as 3 seconds, set in advance has elapsed, the signal is output to the 1/2 screen display selection unit 26 and the display map change instruction unit 37. .

  When it is determined in step S4 that the predetermined map has not yet elapsed since the same map is displayed, the process proceeds to step S7 and the previous display is continued, and the user immediately gives the next scale change instruction or the like. In step S8, this is detected, and the process returns to step S3 again to make the determination. When it is detected that the map display on both screens is different, the display process continues without proceeding to step S4. Is done.

  On the other hand, when it is determined in step S4 that the same map is still displayed after a predetermined time has elapsed since the same map was displayed, the selected scale map is displayed on one screen, that is, FIG. As shown in (c), one map is displayed on the full screen (step S6). In this process, the one- and two-screen display selection unit 26 in FIG. 1 switches to the operation of the one-screen map display unit 25 according to the signal from the elapsed time measurement unit 36, and the content selected as the destination of the map display content selection unit 30 Based on the map, one-screen display is performed.

  Thereafter, as in step S8, it is determined whether or not a scale change instruction for the display map has been issued. If it is determined that the user has not yet issued a scale change instruction, the user determines that the display state is acceptable. Returning to step S5, the full screen display is continued. When it is determined in step S6 that the display map scale change instruction has been issued, the same map display state is lost, so the process proceeds to step S7, where the scale fixed map is displayed at the set scale, and the scale change map is instructed. A normal two-screen map display that is displayed at a reduced scale is performed. Thereafter, the same operation is repeated.

  In the above embodiment, when the monitor screen is divided into two and the map is displayed on each screen, the scale can be fixed by the user's scale change operation for the screen that the user can arbitrarily change the scale. Since it is meaningless to display two maps of the same screen when the same screen is displayed at the same scale as the displayed screen, an example of displaying the map at the same scale on one screen, that is, the entire screen is shown. However, in the present invention, if the same two screens as described above are not displayed, the present invention can be implemented in various modes. When a map is to be displayed, the scale may be skipped immediately and the next scale map may be displayed.

  In this case, for example, it can be operated according to the operation flow of FIG. That is, in the operation flow of the embodiment shown in FIG. 4, in the map two-screen display process, the fixed scale map is first displayed on one screen at a preset scale, and the other screen is scaled by the user. A map that can be changed is displayed at a scale set in advance or instructed (step S11). In this state, it is determined whether or not the user has instructed to change the scale of the display map (step S12). When it is determined that the user has not yet instructed to change the scale, the process returns to step S11 again to appropriately move the vehicle. At the same time, the same display is continued while scrolling the map.

  Thereafter, when it is determined in step S12 that the user has instructed to change the scale of the display map, it is determined whether or not the map on the scale change map screen is the same map as the map on the scale fixed map screen (step S12). S13). Here, when it is determined that the maps are not the same scale and the same content, the process returns to step S11 and the above operation is repeated.

  When it is determined in step 13 that maps of the same content are displayed at the same scale, it is determined whether or not the scale change instruction by the user is a change to the wide area side (step S14). Here, when it is determined that the user has changed to the wide area side, the next scale map on the wide area side is selected and displayed (step S15). On the other hand, when it is determined in step S14 that the scale change is not a change to the wide area side, that is, when it is determined that it is a change instruction to the detailed side, the next detailed map is selected and the map is displayed ( Step S16).

  In the above embodiment, when it is determined in step S13 that the maps on both screens are the same scale and the same content, the map of the next scale is automatically displayed immediately. FIG. As in the embodiment shown, when the user does not give another scale change instruction even after a predetermined time such as 3 seconds elapses, the next scale map may be selected and displayed.

  In the above embodiment, when the maps on both screens are the same scale and the same content is displayed, that is, in the screen example of FIG. 3, the two screens shown in FIG. As shown in FIG. 6B, when the scale of the second screen is changed to the wide-area side as shown in FIG. 6B, both maps display the same content map at the same scale. As shown in FIG. 3, the next wide area map is selected and displayed, and it is possible to prevent the meaningless display of displaying the same map on the two screens as shown in FIG. 3B from being continued.

  When the same map display detection unit 35 in FIG. 1 detects that the two screens are displaying the same content map at the same scale, the signal is immediately sent to the display map change instruction unit 37. The display map change instruction unit 37 can be implemented by selecting a map of the next scale with the display map scale selection unit 31 in the map display content selection unit 30.

  In the present invention, for example, as shown in the operation flow of FIG. 5, as a means for preventing the same map from being displayed on both screens, the map on one side is displayed in a different form from the other map. Also good. In the two-screen display process of the map in the embodiment shown in FIG. 5, an example of performing the same operation as the operation float of the embodiment shown in FIG. 3 is shown. In particular, steps S21 to S24 are steps S1 of FIG. 3. Since the same mode as in Step S4 is shown, the description thereof is omitted.

  When it is determined in step S24 in FIG. 5 that the same map has been displayed and a predetermined time has elapsed, one map is displayed in a format different from the other map (step S25). As a different format, for example, as shown in the figure, and as exemplified in the map display format selection unit 33 in the map display content selection unit 30 of FIG. Display, heading-up display that always displays the traveling direction of the vehicle as information on the screen, 3D display that displays buildings and the like in three dimensions, and bird's-eye view display that displays the traveling direction of the vehicle from above the host vehicle It can be displayed in various display formats. Among these, the second screen example is displayed in the north-up display in FIG. 6 (b) so that even if the maps on both screens are the same scale map, the same content map is not displayed. An example is shown. In the screen display example of the figure, an example is shown in which the first screen is displayed with a size of approximately 1/3 of the entire screen, and the second screen is displayed with a size of approximately 2/3. ing.

  Also in the embodiment shown in FIG. 5, after displaying one map in a format different from the other in step S25, it is determined whether or not the user has instructed to change the scale of the display map. In the next step S27, the processing for displaying both maps in a predetermined display format is performed, and the north-up display as described above is again switched to the two-screen display as shown in FIG. Thereafter, it is determined again whether the user has instructed to change the scale of the display map, and the operation is repeated in the same manner as in the embodiment of FIG.

  In the above embodiment, when the same map is displayed on the two screens, the map display format selection unit 33 in FIG. 1 selects and displays an arbitrary format from various display formats. However, for example, by operating the display selection unit 34, for example, as shown in FIG. 6C, the detailed information of the facility is displayed on the first screen, and the normal facility information display format is displayed on the second screen. Thus, even if the maps on both screens are the same scale, it is possible to prevent the maps having the same contents from being displayed. Note that the embodiment shown in FIG. 6C also shows an example in which the second screen is displayed larger than the first screen, as in the embodiment of FIG. 6B.

  As described above, when selecting various display contents by the display selection unit 34, the VICS information is displayed in addition to the detailed display of the facility as illustrated in FIG. The map of the same content can be prevented from being displayed on both screens in various ways, such as displaying or omitting, displaying or omitting the travel locus, and displaying highway information while traveling on the highway.

  The navigation device as described above according to the present invention can be applied to a navigation device that displays on a portable information terminal, a personal computer, or the like, in addition to being applied to the vehicle navigation device as described above.

It is a block diagram of the Example of this invention. It is a flowchart of Example 1 of this invention. It is an example of a monitor screen display of Example 1 of this invention. It is a flowchart of Example 2 of this invention. It is a flowchart of Example 3 of the present invention. It is a figure which shows the other various examples of the monitor screen of the Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 21 Map image formation part 22 2 screen map display part 23 1st screen map display part 24 2nd screen map display part 25 1 screen map display part 26 1/2 screen display selection part 27 Display ratio selection part 28 Display screen selection part 30 Map display content selection section 31 Display map scale selection section 32 Display area selection section 33 Map display format selection section 34 Display selection section 35 Same map display detection section 36 Elapsed time measurement section 37 Display map change instruction section

Claims (5)

A two-screen map display means for displaying a scale instruction map screen for displaying a map that can be instructed by a user and another map screen;
The same map display detecting means for detecting that the scale instruction map and the other map are displayed at the same scale and having the same content,
A navigation apparatus, comprising: a one-screen map display means for displaying the map on a single screen when the same map display detection means detects that the same map is displayed.   2. The one-screen map display means displays the map on one screen after a predetermined time after the same map display detection means detects that the same map is displayed on two screens. Navigation device. A scale indication map screen for displaying a map that can be specified by a user, a two-screen map display means for displaying another map screen, and a map having the same scale and the same content as the scale indication map and the other map are displayed. The same map display detection means for detecting that has been performed,
A navigation apparatus comprising display map changing means for displaying a map having a different content from the other side on one map screen when the same map display detecting means detects that the same map is displayed. .   The display map changing means, when detecting that the same map is displayed by the same map display detecting means, changes and displays the map at a scale next to the scale change instruction by the user. Item 4. The navigation device according to Item 3.   When the same map display detecting means detects that the same map is displayed, the display map changing means changes the display format of the map on one side to a format different from the other side and displays it. The navigation device according to claim 3.

Images