JP5344973B2 - Navigation device - Google Patents

Description

  The present invention relates to a navigation device that guides a user to a destination, and more particularly to a technique for scrolling a map displayed on a screen.

  In the navigation device, when setting a destination or viewing information on a route or surrounding facilities, an operation for moving the display position of the map, that is, a scroll operation is performed. Incidentally, in general, a navigation device can display a map with a reduced scale. A detailed map such as narrow roads (narrow streets), regional names, facility names, facility types, or facility shapes, etc., is displayed as a detailed map, and detailed information is not displayed. A map displayed at a reduced scale that can be used to confirm a wide area is called a “wide area map”.

  Consider a case where the point to be displayed is relatively far from the currently displayed point. When scrolling on a detailed map, scrolling is performed at a high speed by increasing the moving distance per unit time in order to shorten the time to search for the desired position, but the amount of information displayed on the detailed map is very large Therefore, there is a problem that a desired point cannot be easily found because it is difficult to recognize the display content and cause oversight. In particular, with the recent improvement in hardware performance, the maximum scrolling speed has become very fast.

  On the other hand, when scrolling on a wide area map, the amount of information displayed on the wide area map is smaller than that on the detailed map (the amount of information decreases extremely as the scale is increased). It is difficult to determine a point (for example, a municipality name, a place name, etc.). Therefore, once the operator determines that it is close to the desired point by visual inspection, the scrolling is temporarily stopped, and the scale is changed in the suspended state to check the location on the detailed map. For example, the operation of changing the scale again and scrolling to a wide area map is required, and the operator is forced to perform a very troublesome operation.

  In order to solve such a problem, a method of dividing the screen into two and displaying both a wide area map and a detailed map can be considered. For example, Patent Document 1 discloses a travel position display device that displays a detailed map on one of the two divided screens and associates the two when displaying a wide area map on the other screen. This travel position display device divides the display screen into two parts, displays a detailed map on the divided left screen, displays a wide area map on the right screen, and displays a detailed map on the left screen on the map display area on the right screen. The range where is displayed is displayed as a frame. If the left screen is scrolled, the frame moves in the same direction, and if the frame protrudes from the screen by scrolling, the right screen is also scrolled in the same direction or a wider area map is displayed.

JP 2000-3497 A

  As described above, if the conventional technique for displaying the wide area map and the detailed map by dividing the screen into two parts is used, the operation of frequently changing the scale is not necessary, but the scale of the wide area map and the detailed map are not necessary. If the difference from the scale is large, it is necessary to make the scrolling speed of the detailed map very fast in order to match the moving amount of the wide area map and the moving amount of the detailed map, and the visibility of the detailed map is lowered. . For this reason, scroll while looking at the wide area map, visually determine that you came near the desired point, stop scrolling, check the detailed map to see if it is near the desired point, If it is not near the desired point, an operation of further scrolling and changing the display point is necessary, and the above-described problem that “the operator is forced to perform a very troublesome operation” has not been completely solved.

  In addition, there is an operation means that controls the scroll amount, and by keeping the scroll speed constant while automatically adjusting the scale according to the scroll amount, visibility is reduced while shortening the time to find the desired point. Although there is a technology to improve operability, it is necessary to provide special operation means to control the scroll amount, and in order to switch the scale, the operator grasps the position to some extent while checking the position to some extent. There is a problem that it is necessary to make fine adjustments by using an operation means for adjusting.

  The present invention has been made to solve the above-described problems, and an object thereof is to provide a navigation device that can improve the operability of scrolling.

In order to solve the above problems, the present invention provides a memory for storing data, a display unit for displaying a wide area map, an operation unit for inputting an instruction, and a display in response to a scroll instruction input from the operation unit. A history storage unit that stores data representing a detailed map that is smaller in scale than a wide-area map that moves on the screen of the unit as history data in a memory according to predetermined memory storage conditions, and a scroll instruction is input from the operation unit A snapshot portion is formed on the screen of the display portion, and the detailed map generated based on the history data read from the memory is displayed in accordance with a predetermined snapshot display update condition. and snapshot display unit for displaying, the accumulated data operation unit for selecting a desired historical data from the stored historical data in the memory provided in The history storage unit reads the history data selected by the history data operation unit, and the snapshot display unit displays a detailed map generated based on the history data read from the history storage unit with a predetermined snapshot display update condition. According to the above, it is displayed in the snapshot part.

  According to the present invention, when a scroll operation is performed using the operation unit, a detailed map on which detailed information is displayed is stored in a memory, for example, while displaying a wide-area map having a large moving distance. Since it can be displayed on the snapshot portion at an interval larger than the interval, visibility can be improved. As a result, the operator can perform a scroll operation while grasping detailed information on the detailed map displayed on the snapshot portion while grasping the overall positional relationship such as the prefecture name on the wide area map, for example. A map of a desired point can be easily displayed, and scroll operability can be improved.

It is a block diagram which shows the structure of the navigation apparatus which concerns on Embodiment 1 of this invention. In the navigation apparatus which concerns on Embodiment 1 of this invention, it is a figure which shows the example of a screen display when scroll operation is performed in the state of 1 screen display. In the navigation apparatus which concerns on Embodiment 1 of this invention, it is a figure which shows the example of a screen display when scroll operation is performed in the state of 2 screen display. In the navigation apparatus which concerns on Embodiment 1 of this invention, it is a figure which shows the example of a screen when a scroll is started in the state of a former screen is 1 screen / wide area map. In the navigation apparatus which concerns on Embodiment 1 of this invention, it is a figure which shows the example of a screen when a scroll is started in the state of a former screen is 1 screen / detailed map. In the navigation apparatus which concerns on Embodiment 1 of this invention, it is a figure which shows the other example of a screen when a scroll is started in the state of the former screen is 1 screen / detailed map. In the navigation apparatus which concerns on Embodiment 1 of this invention, it is a figure which shows the example of a screen display when scroll operation is performed in the state of 2 screen display. In the navigation apparatus which concerns on Embodiment 1 of this invention, it is a figure which shows a state transition in case a scroll start is 1 screen display. In the navigation apparatus which concerns on Embodiment 1 of this invention, it is a figure which shows a state transition in case a scroll start is a 2 screen display. It is a flowchart (the 1) for demonstrating operation | movement of the navigation apparatus which concerns on Embodiment 1 of this invention. It is a flowchart (the 2) for demonstrating operation | movement of the navigation apparatus which concerns on Embodiment 1 of this invention. It is a flowchart (the 3) for demonstrating operation | movement of the navigation apparatus which concerns on Embodiment 1 of this invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
Embodiment 1 FIG.
FIG. 1 is a diagram showing a configuration of a navigation device according to Embodiment 1 of the present invention. The navigation device includes a system control unit 11, a GPS (Global Positioning System) receiver 12, a direction sensor 13, a distance sensor 14, a map database 15, an operation unit 16, a memory 17, a display unit 18, and an audio output unit 19. Yes.

  The system control unit 11 is composed of a microcomputer, for example, and controls the entire navigation device. Details of the system control unit 11 will be described later.

  The GPS receiver 12 receives position information transmitted from the satellite and sends it to the system control unit 11 as a current position signal. The direction sensor 13 is composed of, for example, a gyro sensor, detects the traveling direction of the vehicle on which the navigation device is mounted, and sends it to the system control unit 11 as a direction signal. The distance sensor 14 is composed of, for example, a vehicle speed sensor, detects the moving distance of the vehicle, and sends it to the system control unit 11 as a distance signal.

  The map database 15 includes, for example, an HDD (Hard Disk Drive) or a large-capacity flash memory, and stores various map data. The map data stored in the map database 15 is read by the system control unit 11.

  The operation unit 16 includes hard keys 16a and touch keys 16b. The hard key 16a includes, for example, a push button switch provided on the front panel of the navigation device or a remote controller that performs infrared communication, and is used by the user to input various instructions to the navigation device. A signal generated when the user operates the hard key 16a is sent to the system control unit 11 as an operation signal.

  The touch key 16b includes a transparent touch panel placed on the screen of the display unit 18, and is used by the user to input various instructions to the navigation device. A signal generated when the user touches the touch key 16b is sent to the operation control unit 22 of the system control unit 11 as an operation signal.

  The memory 17 is composed of, for example, a RAM (Random Access Memory), and is used for temporarily storing various data. The memory 17 is accessed by a history storage unit 43 included in the history storage control unit 23 of the system control unit 11.

  The display unit 18 is composed of a liquid crystal display device, for example, and displays an image in accordance with an image signal sent from the system control unit 11. The audio output unit 19 is composed of, for example, a speaker, and outputs audio according to an audio signal sent from the system control unit 11.

  Next, details of the system control unit 11 will be described. The system control unit 11 includes a navigation basic operation control unit 21, an operation control unit 22, a history accumulation control unit 23, a snapshot display unit 24, a display control unit 25, and a guidance voice control unit 26.

  The navigation basic operation control unit 21 performs processing for realizing basic functions as a navigation device such as route search, guidance guidance, and facility search. Details of the navigation basic operation control unit 21 will be described later.

  The operation control unit 22 controls the hard key 16 a and the touch key 16 b of the operation unit 16. Specifically, the operation control unit 22 receives an operation signal generated when the user operates the hard key 16a or the touch key 16b, and sends the operation signal to the navigation basic motion control unit 21 and the history accumulation control unit 23 as operation information. .

  The history accumulation control unit 23 stores information related to the scroll operation sent from the navigation basic operation control unit 21 (hereinafter referred to as “scroll state information”), administrative district information (hereinafter referred to as “administrative district change information”), and history accumulation. Scrolling is controlled based on the map data (hereinafter referred to as “map display data (for accumulation)”) and the operation information sent from the operation control unit 22. Details of the history accumulation control unit 23 will be described later.

  The snapshot display unit 24 generates a snapshot screen based on the map data for snapshot display sent from the history accumulation control unit 23 (hereinafter referred to as “map display data (for snapshot)”), and displays an image. The signal is sent to the display unit 18 as a signal.

  The display control unit 25 generates a map display screen based on map display map data (hereinafter referred to as “map display data (for display)”) sent from the navigation basic operation control unit 21, The signal is sent to the display unit 18 as a signal. The guidance voice control unit 26 generates a voice signal based on the guidance voice information sent from the basic navigation operation control unit 21 and sends it to the voice output unit 19.

  Next, details of the navigation basic operation control unit 21 will be described. The basic navigation operation control unit 21 includes a host vehicle position specifying control unit 31, a map data management unit 32, a search control unit 33, a guidance control unit 34, a search control unit 35, and a map generation control unit 36.

  The own vehicle position specifying control unit 31, also called a locator, is based on the current position signal sent from the GPS receiver 12, the direction signal sent from the direction sensor 13, and the distance signal sent from the distance sensor 14. Identify your vehicle position. The vehicle position specified by the vehicle position specifying control unit 31 is sent to the search control unit 33, the guidance control unit 34, the search control unit 35, and the map generation control unit 36 as vehicle position data.

  The map data management unit 32 receives map data from the map database 15 in response to a request from the own vehicle position specifying control unit 31, the search control unit 33, the guidance control unit 34, the search control unit 35, or the map generation control unit 36. get. The map data acquired by the map data management unit 32 is sent to the request source.

  The search control unit 33 is indicated by operation information sent from the operation unit 16 via the operation control unit 22 from the own vehicle position indicated by the own vehicle position data sent from the own vehicle position specifying control unit 31. A route to the destination is searched based on the map data acquired from the map database 15 via the map data management unit 32. The route searched by the search control unit 33 is sent to the guidance control unit 34 as route data.

  The guidance control unit 34 performs control to guide / guide the host vehicle to the destination. Specifically, the guidance control unit 34 obtains a guide map for guiding a route indicated by the route data sent from the search control unit 33 from the map database 15 via the map data management unit 32. Based on the data, it is sent to the map generation control unit 36 as guide map data, and guidance voice information is generated based on the information included in the map data along the route and sent to the guidance voice control unit 26.

  The search control unit 35 searches for nearby facilities. Specifically, the search control unit 35 acquires the map acquired from the map database 15 via the map data management unit 32 according to the search conditions indicated by the operation information sent from the operation unit 16 via the operation control unit 22. Search facilities from data. The facility searched by the search control unit 35 is sent to the map generation control unit 36 as facility data.

  The map generation control unit 36 generates map data to be displayed. Specifically, the map generation control unit 36 controls the route indicated by the route data sent from the search control unit 33 on the map indicated by the map data acquired from the map data management unit 32, and the vehicle position specifying control. The vehicle position mark shown by the vehicle position data sent from the unit 31, the guide map shown by the guide map data sent from the guidance control unit 34, and the facility data sent from the search control unit 35 Is generated as map display data (for display) and sent to the display control unit 25. Further, the map generation control unit 36 generates map data for history accumulation and sends it to the history accumulation control unit 23 as map display data (for accumulation).

  Next, details of the history accumulation control unit 23 will be described. The history accumulation control unit 23 includes an accumulation data operation unit 41, a history accumulation determination unit 42, and a history accumulation unit 43.

  The accumulated data operation unit 41 generates information related to the operation of accumulated data based on the operation information sent from the operation control unit 22 and sends it to the history accumulation unit 43 as history operation information. In the history operation information, “−1” for instructing the previous history data stored in the memory 17, “+1” for instructing the previous history data, or the history data is instructed directly. Information such as “selection” is included.

  The history accumulation determination unit 42 generates an accumulation request for instructing accumulation or update of map display data (for accumulation) based on the scroll state information and administrative district change information sent from the navigation basic operation control unit 21, and the history accumulation Send to part 43. Note that the scroll state information includes information indicating scroll start, interruption, end, scroll movement amount, and the like. The administrative district change information includes information such as prefectures, municipalities, and street addresses.

  The history storage unit 43 manages data in accordance with the history operation information sent from the stored data operation unit 41 and the storage request sent from the history storage determination unit 42. Specifically, the history storage unit 43 stores the map display data (for storage) sent from the navigation basic operation control unit 21 in the memory 17 as history data. Further, the history storage unit 43 reads history data selected by the history operation information sent from the stored data operation unit 41 from the memory 17 and sends it to the navigation basic operation control unit 21 as history selection information. Further, the history storage unit 43 reads the history data from the memory 17 and sends it to the snapshot display unit 24 as map display data (for snapshot).

  Next, a display screen displayed on the display unit 18 will be described. FIG. 2 is a diagram illustrating an example of a screen display when a scroll operation is performed in a state where a single screen is displayed. FIG. 2A shows an example of screen display during scrolling. A snapshot area is formed on a wide area map or a detailed map, and a snapshot portion is displayed superimposed on the snapshot area. In the snapshot portion, a detailed map of the latest passing point is displayed, and a “display erase” button for deleting the snapshot portion is displayed.

  FIG. 2B is an example of screen display during scroll interruption or accumulated data operation. The snapshot area is enlarged, and a history operation button is displayed in the enlarged portion. The history operation button includes a -1 button (left triangle mark) 51 for designating the previous history data, a +1 button (right triangle mark) 52 for designating the previous history data, and the like. A selection button 53 for directly specifying the history data stored in the memories N-2 to N displayed between the -1 button 51 and the +1 button 52 is included. In the memories N-2 to N, an image obtained by reducing the snapshot display is displayed. In addition, a “move” button for moving the cursor indicated by the “+” mark to the position displayed on the snapshot screen is displayed on the screen during scroll interruption or accumulated data operation. In the example shown in FIG. 2B, the state where the memory N point is selected is shown.

  FIG. 3 is a diagram illustrating an example of screen display when a scroll operation is performed in a state where two screens are displayed. FIG. 3A is an example of a screen display during scrolling. A wide area map or a detailed map is displayed on the left screen (hereinafter referred to as “parent screen”), and the right screen (hereinafter referred to as “child screen”). ) Shows the snapshot part. In the snapshot portion, a detailed map of the latest passing point is displayed, and a “display erase” button for deleting the snapshot portion is displayed.

  FIG. 3B shows an example of screen display during scroll interruption or accumulated data operation, where a wide area map or a detailed map is displayed on the main screen, and the snapshot portion is displayed on the sub screen. A history operation button and a “move” button are displayed in the snapshot portion. The configuration of the snapshot portion is the same as the configuration shown in FIG.

  Next, the operation of the navigation device according to Embodiment 1 of the present invention configured as described above will be described. First, the basic operation of history accumulation during scrolling will be described.

(A) When scrolling is started by the user operating the operation unit 16, snapshot display is started in accordance with conditions set by the user. The conditions (setting items) that can be set by the user will be described in detail later.

  When the screen display before the start of scrolling is a single screen display, the snapshot portion is displayed superimposed on a part of the original screen. The display position of the snapshot portion is determined at a position that does not interfere with the viewing of the original screen in consideration of the scroll direction. At this time, the cursor (“+” mark) arrangement on the screen is also moved as appropriate.

  When scrolling is started with the original screen in the state of one screen / wide area map, as shown in FIG. 4, the original screen remains in the wide area map, and the detailed map of the scale set by the user is displayed in the snapshot portion. .

  When scrolling is started in a state where the original screen is one screen / detailed map, the operation is changed according to the user's setting. That is, as shown in FIG. 5, when scrolling is started, the original screen is switched to the wide area map, and the detailed map of the scale set by the user or the detailed map of the same scale as the original screen is displayed in the snapshot portion. The Alternatively, as shown in FIG. 6, the scale of the original screen is maintained, and the detailed map of the scale set by the user or the detailed map of the same scale as the original screen is displayed in the snapshot portion.

  When the screen display before the start of scrolling is a two-screen display, the parent screen is used for scrolling and the child screen is used for snapshot display. As shown in FIG. 7, when scrolling is started while the two-screen display / main screen is in a wide area map state, the original screen remains in the wide area map and the detailed map or sub-screen of the scale set by the user is displayed in the snapshot portion. A detailed map (or wide area map) of the scale is displayed.

  When scrolling is started while the two-screen display / parent screen is in the detailed map state, the operation is changed according to the user's setting. That is, the parent screen is switched to the wide area map, and the detailed map of the scale set by the user or the detailed map of the same scale as the parent screen is displayed in the snapshot portion. Alternatively, the scale of the main screen is held, and the detailed map of the scale set by the user or the detailed map of the same scale as the main screen is displayed in the snapshot portion.

(B) While scrolling continues by the user operating the operation unit 16, the accumulated data is generated or updated according to the conditions set by the user, and the latest data is displayed on the snapshot unit. The The accumulated data is generated under the conditions set by the user and accumulated in the memory 17. This accumulated data is referred to as “history data”.

An example of conditions set by the user, that is, data accumulation timing is shown below.
(A) Accumulate every time a certain distance is scrolled.
(B) Accumulate every fixed time.
(C) Accumulate every time the administrative district (prefecture, municipality, etc.) changes.

  The fixed distance and the fixed time described above are determined by the user inputting an arbitrary value or by the user selecting from a list prepared in advance. Note that it is also possible to automatically set a recommended value corresponding to a scale prepared in advance without being determined directly by the user.

  In the above-described example, the latest accumulated data is displayed on the snapshot unit. However, the data storage timing and the display timing can be configured not to be synchronized. That is, the display timing can be made smaller than the data accumulation timing. As a result, it is possible to increase the recognition rate by slowing the display update cycle without reducing the data storage density. The point of not reducing the data storage density is beneficial from the viewpoint of increasing the amount of information when searching for desired data from historical data to be described later.

The display timing of the snapshot portion can also be configured to be set by the user in the same manner as the data accumulation timing. An example of conditions set by the user, that is, data display timing is shown below.
(A) Same as data accumulation timing.
(B) Displayed every time a certain distance is scrolled.
(C) Display at regular intervals.
(D) Displayed every time the administrative district (prefecture, municipality, etc.) changes.

  Also in this case, the fixed distance and the fixed time are determined by the user inputting an arbitrary value or by the user selecting from a list prepared in advance. In addition, it is also possible to automatically set a recommended value corresponding to the scale prepared in advance without being determined directly by the user.

(C) When scrolling is interrupted by the user operating the operation unit 16, the generation or update of accumulated data and the display update of the snapshot unit are stopped.

  When scrolling is interrupted, the point displayed in the snapshot portion can be changed by changing the reference position of the memory 17 according to the history operation information from the accumulated data operation portion 41. Further, when the “move” button is operated in a state where the point displayed in the snapshot part is different from the position where the cursor currently exists, the cursor moves to the position of the map displayed in the snapshot part.

  Further, the display of the snapshot portion can be erased by operating the “display erase” button. When the display of the snapshot portion is erased, the snapshot is automatically redisplayed when scrolling is resumed.

  FIG. 8 is a diagram illustrating a state in which the states of “before scrolling”, “during scrolling operation”, and “interruption of scrolling operation” are changed when the screen display before the start of scrolling is a single screen display. FIG. 9 is a diagram illustrating a state in which the states of “before scrolling start”, “during scrolling operation”, and “interruption of scrolling operation” are transitioned when the screen display before the start of scrolling is a two-screen display.

  Next, conditions that can be set by the user, that is, setting items in the navigation device according to Embodiment 1 will be described below.

(1) With / without snapshot display Set whether or not to display a snapshot when scrolling is performed. If “present”, snapshot display is performed, and if “not present”, snapshot display is not performed.

(2) Snapshot display start condition 1
When the snapshot display is set to “present”, the timing for starting the snapshot display is set. As the snapshot display start condition 1, the following settings are possible.
(2-1) Display is immediately started at the time of scrolling operation (2-2) Display is started when scrolling operation continues for a certain time (XX seconds) or longer (2-3) Scroll movement is a certain distance (XXkm) Display is started when the above is continued (2-4) Display is started when the scroll range is outside the screen range before the scroll start (2-5) System recommended conditions

(3) Snapshot display start condition 2
Sets whether or not to limit the snapshot display according to the scale when the snapshot display is set to “present”. As the snapshot display start condition 2, the following settings are possible.
(3-1) No limit by scale (3-2) Limit by scale (displayable scale XX)
(3-3) Recommended system conditions

(4) Termination condition for snapshot display When the snapshot display is set to “present”, the timing for terminating the snapshot display is set. The following setting is possible as the snapshot display end condition.
(4-1) End only at the end of the scroll operation (4-2) End when the scroll operation is not performed for a certain time (XX seconds) (4-3) Recommended system conditions

(5) Memory storage condition 1
When the snapshot display is set to “present”, the timing for updating the accumulation in the memory 17 is set. As the memory accumulation condition 1, the following settings are possible.
(5-1) Update every fixed time (XXms) (5-2) Update every fixed distance (XXkm) (5-3) Update every administrative district change (5-4) Update with recommended conditions according to the scale ( 5-5) Recommended system conditions

(6) Memory storage condition 2
When the snapshot display is set to “present”, the amount stored in the memory 17 is set. As the memory accumulation condition 2, the following setting is possible.
(6-1) Memory number (XX) or less (6-2) Distance (XXkm) or less (6-3) Memory capacity (XX bytes) or less (6-4) System recommended conditions

(7) Memory accumulation condition 3
When the snapshot display is set to “present”, the operation when the capacity stored in the memory 17 is exceeded is set. As the memory accumulation condition 3, the following setting is possible.
(7-1) Overwrite (7-2) Storage interruption (7-3) System recommended conditions

(8) Snapshot display update condition When the snapshot display is set to “present”, the timing for updating the display of the snapshot is set. This snapshot display update condition can be set independently of the memory accumulation conditions 1 to 3. As the snapshot display update condition, the following settings are possible.
(8-1) Update display every memory storage update (8-2) Update display every fixed time (XXms) (8-3) Update display every fixed distance (XXkm) (8-4) Change in administrative district Update the display every time (8-5) Update the display with system recommended conditions according to the scale

(9) Scale display condition of parent screen of snapshot display When the snapshot display is set to “present”, the scale of the parent screen is set. The following settings are possible as scale display conditions for the parent screen of the snapshot display.
(9-1) Keep original scale (9-2) Switch to scale value set by user (9-3) Switch to system recommended scale value

(10) Scale display condition of snapshot screen of snapshot display When the snapshot display is set to “present”, the scale of the snapshot screen is set. The following settings are possible as scale display conditions for the snapshot screen of the snapshot display.
(10-1) Switch to the scale value set by the user (10-2) Switch to the system recommended scale value

(11) Snapshot screen display position of snapshot display When the snapshot display is set to “present”, the display position of the snapshot screen is set. The following setting is possible as the display position of the snapshot screen of the snapshot display.
(11-1) Automatically switch to a two-screen display, and display a snapshot on the sub-screen (11-2) superimpose on a part of the screen (position is fixed at the user setting point)
(11-3) Superimpose on a part of the screen (position is recommended by the system)

  Next, scroll processing performed by the navigation device configured as described above will be described with reference to the flowchart shown in FIG.

  In the scroll process, first, the scroll state is determined (step ST11). That is, the history accumulation determination unit 42 of the history accumulation control unit 23 included in the system control unit 11 analyzes the scroll state information transmitted from the navigation basic operation control unit 21. Next, the scroll state is checked (step ST12). That is, based on the analysis result in step ST11, the history accumulation determination unit 42 checks whether scrolling, scrolling stop, or other than scrolling.

  If it is determined in step ST12 that scrolling is in progress, then snapshot display is performed (step ST13). That is, the history storage unit 43 reads the history data from the memory 17 in response to the storage request from the history storage determination unit 42 and sends it to the snapshot display unit 24 as map display data (for snapshot). As a result, the snapshot display unit 24 displays the snapshot unit on the screen of the display unit 18.

  Next, the history operation button is deleted (step ST14). That is, the history storage unit 43 instructs the snapshot display unit 24 to delete the history operation button. As a result, the snapshot display unit 24 deletes the history operation button in the snapshot unit. Next, the scroll duration time is calculated (step ST15). That is, the history accumulation determination unit 42 calculates the time during which the scrolling is continued based on the scroll state information from the navigation basic operation control unit 21.

  Next, the scroll movement distance is calculated (step ST16). In other words, the history accumulation determination unit 42 calculates the moving distance of the map by scrolling based on the scroll movement amount included in the scroll state information from the navigation basic operation control unit 21. Next, administrative district change determination is performed (step ST17). That is, the history accumulation determination unit 42 analyzes the administrative district change information from the navigation basic operation control unit 21.

  Next, a history accumulation condition establishment determination is performed (step ST18). That is, the history accumulation determination unit 42 determines whether or not the history accumulation condition is satisfied based on the analysis result of the scroll duration calculated in step ST15, the scroll movement distance calculated in step ST16, and the administrative district change information determined in step ST17. The analysis result is sent to the history storage unit 43.

  Next, it is checked whether or not the history accumulation condition is satisfied (step ST19). That is, the history storage unit 43 checks whether or not a history storage condition is satisfied based on the analysis result sent from the history storage determination unit 42 in step ST18. If it is determined in this step ST19 that the history storage condition is satisfied, then a history data update process is executed (step ST20). That is, the history storage unit 43 stores the map display data (for storage) sent from the navigation basic operation control unit 21 in the memory 17 as history data. On the other hand, if it is determined in step ST19 that the history accumulation condition is not satisfied (not satisfied), the process of step ST20 is skipped.

  Next, it is checked whether or not the snapshot update condition is satisfied (step ST21). That is, the history storage unit 43 checks whether the snapshot update condition is satisfied based on the analysis result sent from the history storage determination unit 42 in step ST18. If it is determined in step ST21 that the snapshot update condition is satisfied, then a snapshot display update process is executed (step ST22). That is, the history storage unit 43 reads the history data from the memory 17 and sends it to the snapshot display unit 24 as map display data (for snapshot). Thereafter, the sequence returns to step ST11, and the above-described processing is repeated. Even when it is determined in step ST21 that the snapshot update condition is not satisfied (not satisfied), the sequence returns to step ST11 and the above-described processing is repeated.

  If it is determined in step ST12 that scrolling is stopped, then snapshot display is performed as shown in the flowchart of FIG. 11 (step ST23). The process in step ST23 is the same as the process in step ST13 described above. Next, a history operation button is displayed (step ST24). That is, the history storage unit 43 instructs the snapshot display unit 24 to display a history operation button. As a result, the snapshot display unit 24 displays a history operation button in the snapshot unit.

  Next, the scroll duration is set to an initial value (step ST25). That is, the history accumulation determination unit 42 sets the scroll duration time to an initial value. Next, the scroll movement distance is set to an initial value (step ST26). That is, the history accumulation determination unit 42 sets the scroll movement distance to an initial value. Next, administrative district change determination is set to an initial value (step ST27). That is, the history accumulation determination unit 42 sets the administrative district change determination result to the initial value.

  Next, a history operation determination is performed (step ST28). That is, the history accumulation unit 43 analyzes the history operation information sent from the accumulated data operation unit 41. Next, it is checked whether there is a history operation (step ST29). That is, the history storage unit 43 checks whether there is a history operation based on the analysis result in step ST28. If it is determined in step ST29 that there is no history operation, the scrolling process ends.

  On the other hand, if it is determined in step ST29 that there is a history operation, a history data operation process is performed (step ST30). That is, the history storage unit 43 controls the change of the snapshot display, etc., according to the analysis result in step ST28. Next, it is checked whether or not the scroll position needs to be changed (step ST31). That is, the history accumulating unit 43 checks whether or not the scroll position needs to be changed as a result of the history data operation process performed in step ST30.

  If it is determined in step ST31 that the scroll position needs to be changed, the scroll position is changed (step ST32). That is, the history storage unit 43 instructs the display control unit 25 to change the scroll position. Thereby, the display position of the map on the parent screen or the original screen indicated by the map display data sent from the navigation basic operation control unit 21 is changed according to the history information. Thereafter, the scroll process ends. If it is determined in step ST31 that it is not necessary to change the scroll position, the scroll process is also terminated.

  If it is determined in step ST12 that it is other than scrolling, then the snapshot is erased as shown in the flowchart of FIG. 12 (step ST35). That is, the history storage unit 43 instructs the snapshot display unit 24 to delete the snapshot unit. As a result, the snapshot is erased.

  Next, the history operation button is deleted (step ST36). That is, the history storage unit 43 instructs the snapshot display unit 24 to delete the history operation button. As a result, the history operation button displayed by expanding the snapshot portion is deleted. Next, the scroll duration is set to an initial value (step ST37). That is, the history accumulation determination unit 42 sets the scroll duration time to an initial value. Next, the scroll movement distance is set to an initial value (step ST38). That is, the history accumulation determination unit 42 sets the scroll movement distance to an initial value. Next, administrative district change determination is set to an initial value (step ST39). That is, the history accumulation determination unit 42 sets the administrative district change determination result to the initial value. Thereafter, the scroll process ends.

  As described above, according to the navigation device according to the first embodiment of the present invention, when a scroll operation is performed, a detailed map in which detailed information is displayed while displaying a wide-area map with a large moving distance. The operator can scroll while grasping detailed information on the detailed map displayed in the snapshot part while grasping the overall positional relationship such as the prefecture name on the wide area map. It is possible to display a map of a desired point easily.

  Also, even if the operator accidentally scrolls too much, the user can select by checking the map data stored in order using the stored data operation unit without performing the operation of returning the display position by scrolling again. By performing this operation, a map of a desired point can be easily displayed.

  DESCRIPTION OF SYMBOLS 11 System control part, 12 GPS receiver, 13 Direction sensor, 14 Distance sensor, 15 Map database, 16 Operation part, 16a Hard key, 16b Touch key, 17 Memory, 18 Display part, 19 Voice output part, 21 Basic navigation operation Control unit, 22 operation control unit, 23 history accumulation control unit, 24 snapshot display unit, 25 display control unit, 26 guidance voice control unit, 31 own vehicle position specifying control unit, 32 map data management unit, 33 search control unit, 34 Guidance control unit, 35 Search control unit, 36 Map generation control unit, 41 Accumulated data operation unit, 42 History accumulation determination unit, 43 History accumulation unit.

Claims (3)

A memory for storing data;
A display unit for displaying a wide area map;
An operation unit for inputting instructions;
Data representing a detailed map having a smaller scale than a wide area map that moves on the screen of the display unit in response to a scrolling instruction input from the operation unit is stored as history data in accordance with predetermined memory storage conditions. A history storage unit to be stored in
When a scroll instruction is input from the operation unit, a snapshot unit is formed on the screen of the display unit, and a detailed map generated based on the history data read from the memory is displayed as a predetermined snapshot. In accordance with the display update condition, a snapshot display part to be displayed on the formed snapshot part ,
A storage data operation unit for selecting desired history data from the history data stored in the memory;
The history storage unit reads the history data selected by the history data operation unit,
The snapshot display unit causes the snapshot unit to display a detailed map generated based on the history data read from the history storage unit according to a predetermined snapshot display update condition.
A navigation device characterized by that . Predetermined memory storage conditions used in the history storage unit, a timing of updating the storage to the memory, or amount, accumulated in the memory capacity for storing to said memory defines the operation when the over claim 1 Symbol placement of the navigation device, characterized in that. The display unit displays a cursor superimposed on an arbitrary position on a wide area map,
The cursor moves to a position corresponding to the detailed map displayed in the snapshot section on the wide area map according to a predetermined instruction input to the operation section.
The navigation device according to claim 1.

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