JP2005352170A - Map display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a map display device capable of changing a display manner according to use history and displaying a map excellent in visibility. <P>SOLUTION: The map display device comprises: a map information acquisition means 3 for acquiring map data; a display means 9 for displaying the map based on map elements included in the map data acquired by the map information acquisition means 3; a use history storage means 4 for storing, as use history information, the use state of the map elements included in the map data acquired by the map information acquisition means 3; and a display control means 8 for changing the map elements according to the use history information stored in the use history storage means 4 and displaying them on the display means 9. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a map display device that displays a map, and particularly to a technique for improving the visibility of a displayed map.

  Conventionally, for example, a map display device used for an in-vehicle navigation device is known. In this map display device, map elements are always arranged in a predetermined shape, size and color according to data such as the shape, size and color of the map elements stored in the map database. A map is displayed. In addition, in order to improve the visibility of a map, display data such as landmarks and animations are prepared, and characteristic facilities are emphasized and displayed using the display data.

  As a technique for displaying a map in a special manner, Patent Document 1 discloses an “in-vehicle information processing apparatus having a map information update function” capable of obtaining an update map unique to a user according to a user's road use situation. Yes. This in-vehicle information processing apparatus is installed in a car navigation system as an in-vehicle system. This in-vehicle information processing apparatus inputs map information including the road width and shape of a road on which the vehicle travels from the map DB, own vehicle position information from the GPS receiver, and road image information from the camera. / F and road survey data including the road width and shape of the road based on the image information and the vehicle position information input by the I / F are analyzed, and the analyzed road survey data and map information are mutually connected. A ROM that records a program for comparing and updating the map information to become road survey data according to the comparison result and displaying it on the monitor via the I / F, and a CPU that executes the program are provided. .

  Patent Document 2 discloses an “electronic device having a map display function” that can make a user feel effectively that map data is out of date and promote the desire to update map data. doing. This electronic device reads data representing a map to be displayed from a storage medium (CD-ROM) storing map data, and displays the map in an in-vehicle navigation device that displays the map to be displayed on the display device. At this time, a period from the creation time of the map data stored in the CD-ROM to the present time is calculated as the use period of the map data, and the display state of the map is changed according to the calculated use period. For example, the color of the road in the map is lightened or changed to sepia as the map data is used longer. For this reason, it is possible to make the user feel intuitively and intuitively that the map data (that is, the contents of the map) is out of date, and promote the desire to update the map data.

JP 2001-280975 A JP 2001-141473 A

  However, in the method of always displaying a map using the map data as it is as in the conventional map display device described above, the visibility is not always good for some users. For example, a user who has become familiar with a specific area by using roads and facilities many times displays a detailed map of that specific area, even map elements that are not particularly necessary. May feel complicated. As a result, there is a problem that even if the display method is detailed and polite for a user who lacks information on the specific area, the visibility is poor for a user who is bright on the information on the specific area.

  Conversely, because it is not a large facility, it is not registered as a landmark in the map data, but if you want to display it prominently because it is used frequently, it is not possible to display a mark on the map using the function to register points Although it is possible, for this purpose, a troublesome work in which a user manually inputs a position and the like is necessary.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a map display device excellent in visibility that can be displayed by changing a display mode according to a use history.

  The map display device according to the present invention includes a map information acquisition unit that acquires map data, a display unit that displays a map based on map elements included in the map data acquired by the map information acquisition unit, and a map information acquisition unit. Usage history storage means for storing the usage status of the map elements included in the acquired map data as usage history information, and the display elements by changing the map elements according to the usage history information stored in the usage history storage means Display control means for displaying.

  According to the map display device of the present invention, the usage status of the map element included in the map data is stored as usage history information, and the map element is changed according to the stored usage history information to display means. Since it is configured to be displayed on the screen, a specific map element can be highlighted and displayed in accordance with the usage status of the map element. As a result, the visibility of the map can be improved.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the following description, it is assumed that the map display device according to the embodiment of the present invention is applied to an in-vehicle navigation device.
Embodiment 1 FIG.
FIG. 1 is a block diagram showing a functional configuration of a map display device according to Embodiment 1 of the present invention. This map display device includes a position detection means 1, an input means 2, a map information acquisition means 3, a use history storage means 4, a route search means 5, a point search means 6, a time / day of the week detection means 7, a display control means 8 and a display. It is comprised from the means 9.

  The position detection means 1 detects the current position of the vehicle. Current position data representing the current position of the vehicle detected by the position detection means 1 is sent to the display control means 8.

  The input means 2 is used to set the display mode and display options used in the display function, to input the starting point, waypoint, and destination used in the route search function, the address of the point used in the point search function, and mail Used to enter numbers, genres, etc. The input data input from the input unit 2 is sent to the display control unit 8, the route search unit 5, and the point search unit 6.

  The map information acquisition means 3 acquires map data which is data constituting a map such as the shape and position of roads and facilities. The map data includes map elements, which are one unit of display parts used when expressing a map, such as roads, facilities, railways, and backgrounds. FIG. 2 is a diagram illustrating an example of map elements included in the map data. In the example shown in FIG. 2, the map data is composed of 24 map elements such as road 1 to road 13, home 1, facility 1 to facility 8, railway, and background 1. For roads, one road link is defined as one map element.

  As the map information acquisition means 3, various means having a map data acquisition function can be adopted. For example, the map information acquisition means 3 can be comprised from the memory | storage device which reads map data from a recording medium, the communication apparatus which acquires map data from a server via a network. The map data acquired by the map information acquisition unit 3 is sent to the display control unit 8 and the route search unit 5.

  The usage history storage means 4 stores the history of map elements used in the past as usage history information. For example, as shown in FIG. 3, the usage history information includes items such as an identifier for identifying a used map element, the position, type, attribute, reference count, reference date, reference day of the week, and reference time of the map element. Including.

  Registration and update of the usage history information in the usage history storage unit 4 is controlled by the display control unit 8. That is, each time a new map element is used, the display control means 8 registers the use history information for the map element in the use history storage means 4. The display control means 8 updates the reference count of the map element every time a map element already registered in the usage history storage means 4 is reused, and also refers to the reference date, reference day of the week, and reference time. Add

  Note that the usage history information is not limited to the items described above, and can be simplified by replacing other items, adding other items, or deleting items. In addition, the reference date, reference day, and reference time can be configured to register only the date, day, and time of the last reference. Furthermore, the registration to the usage history storage unit 4 may be configured not to target all map elements but to a specific map element (for example, only a road).

  The route search unit 5 searches for a route based on the point data such as the waypoints and destinations input from the input unit 2 and the map data from the map information acquisition unit 3. The route data representing the route searched by the route search means 5 is sent to the display control means 8. Further, the route search means 5 can be configured to perform a route search using the point searched by the point search means 6 as a transit point or destination (details will be described later).

  When the data such as address, zip code, and genre is input from the input unit 2, the point search unit 6 searches for a corresponding point (for example, a facility). Data representing the point obtained by this search is sent to the display control means 8 and the route search means 5.

  The time / day-of-week detection means 7 detects the date, time, and day of the week from a timer mechanism (not shown), for example. The date, time, and day of the week detected by the time / day of the week detection means 7 are sent to the display control means 8. The time / day-of-week detection means 7 can also be constituted by a GPS (Global Positioning System) receiver that receives date information transmitted from a GPS satellite.

  The display control means 8 generates map display data from the current position data obtained from the position detection means 1, the map data obtained from the map information acquisition means 3, and the usage history information obtained from the usage history storage means 4. The map display data generated by the display control means 8 is sent to the display means 9. Further, the display control unit 8 registers the usage history information in the usage history storage unit 4 or updates the usage history information already registered in the usage history storage unit 4. Details of the operation of the display control means 8 will be described later.

  The display unit 9 displays the map in a plurality of modes (details will be described later) based on the map display data sent from the display control unit 8.

  Next, a hardware configuration of the map display device for realizing the functional configuration described above will be described.

  FIG. 4 is a block diagram showing a hardware configuration of the map display apparatus according to Embodiment 1 of the present invention. The map display device includes a position detection unit 21, an operation unit 22, a data storage unit 23, a control unit 24, and a display unit 25.

  The position detector 21 corresponds to the position detector 1 shown in the functional block diagram of FIG. The position detection unit 21 includes a geomagnetic sensor, a vehicle speed sensor, a GPS receiver, and the like (all not shown). The geomagnetic sensor detects the traveling direction of the vehicle and generates direction data. The vehicle speed sensor detects the moving speed of the vehicle and generates speed data. The GPS receiver receives a radio wave including position information and date information transmitted from a GPS satellite and generates GPS data. The position detection unit 21 detects the current position (latitude and longitude) based on these azimuth data, vehicle speed data, and GPS data, and sends it to the control unit 24 as current position data.

  The operation unit 22 corresponds to the input unit 2 shown in the functional block diagram of FIG. The operation unit 22 includes input devices such as a key switch and a light pen, and is used by a user to give various instructions to the in-vehicle navigation device. For example, the operation unit 22 is used for inputting a waypoint and a destination when searching for a route, inputting a display mode, and the like. Input data input from the operation unit 22 is sent to the control unit 24.

  The data storage unit 23 corresponds to the map information acquisition unit 3 shown in the functional block diagram of FIG. The data storage unit 23 includes a large-capacity external storage device such as a hard disk device (HDD), DVD, or CD. The data storage unit 23 stores the map data described above. The map data stored in the data storage unit 23 is read by the control unit 24.

  The control unit 24 corresponds to the display control unit 8, the route search unit 5, and the point search unit 6 shown in the functional block diagram of FIG. The control unit 24 includes a microcomputer provided with an input circuit 31, a memory 32, a CPU 33, and an output circuit 34.

  The input circuit 31 functions as an input interface that receives current position data from the position detection unit 21, input data from the operation unit 22, and map data from the data storage unit 23 and passes them to the CPU 33. The memory 32 stores a control program for operating the CPU 33. The CPU 33 performs display control processing, route search processing, point search processing, and the like by operating according to the control program stored in the memory 32. The output circuit 34 functions as an output interface that receives map display data from the CPU 33 and sends it to the display unit 25.

  The display unit 25 corresponds to the display unit 9 shown in the functional block diagram of FIG. The display unit 28 is composed of, for example, an LCD, and displays a map according to the map display data sent from the control unit 24. The display unit 25 is also used to display various messages in addition to the map, but description thereof is omitted in this specification.

  Next, the operation of the map display device according to Embodiment 1 of the present invention configured as described above will be described.

  First, details of the usage history information addition and update processing will be described with reference to the flowchart shown in FIG. This addition and update processing is executed each time the map displayed on the display means 9 is updated.

  In the use history information addition and update processing, first, the current position is acquired (step ST10). That is, the position detection means 1 detects the current position of the vehicle and generates current position data. The display control unit 8 acquires the current position data generated by the position detection unit 1.

  Next, surrounding map elements are extracted (step ST11). Specifically, the display control means 8 acquires a predetermined range of map data centered on the position indicated by the current position data acquired from the position detection means 1 in step ST10 from the map information acquisition means 3, and the predetermined range Map elements included in the map data. In the example shown in FIG. 2, 24 map elements such as road 1 to road 13, home 1, facility 1 to facility 8, railway, and background 1 are extracted.

  Next, an identifier of the map element is obtained (step ST12). That is, the display control means 8 selects one map element from the map elements extracted in step ST11, and obtains an identifier for identifying the selected map element. Specifically, a unique identifier is calculated for each map element from information unique to map data and position information. For example, as a road identifier, an ID given to a unique road link for each road is calculated.

  Next, usage history information is acquired (step ST13). That is, the display control unit 8 acquires usage history information as shown in FIG. 3 from the usage history storage unit 4. Next, it is checked whether usage history information exists (step ST14). Specifically, the display control means 8 checks whether or not the same identifier as the identifier of the map element selected in step ST12 exists in the usage history information acquired in step ST13.

  If it is determined in step ST14 that the same identifier as the identifier of the map element selected in step ST12 is present in the usage history information acquired in step ST13, the usage history information is updated (step ST15). . That is, the display control unit 8 updates the corresponding usage history information in the usage history storage unit 4. Specifically, the display control means 8 increments (+1) the number of references in the corresponding usage history information, acquires the current date, day of the week, and time from the time / day-of-week detection means 7, and refers to it. Additional writing is made in the fields of year / month / day, reference day of the week, and reference time. Thereafter, the sequence proceeds to step ST17.

  On the other hand, if it is determined in step ST14 that the same identifier as the map element selected in step ST12 does not exist in the usage history information acquired in step ST13, the usage history information is added (step ST14). ST16). That is, the display control means 8 writes the map element identifier obtained in step ST12 in the usage history storage means 4 in the usage history information identifier field, acquires the current position data from the position detection means 1, and writes it in the position field. The type and attribute of the map element are written in the type column and the attribute column respectively, “1” is written in the reference count column, the current date, day of the week, and time are obtained from the time / day-of-week detecting means 7 and the reference year is obtained. Write in the fields of month, day of the week and reference time. Thereafter, the sequence proceeds to step ST17.

  In step ST17, it is checked whether or not the processing for all the map elements extracted in step ST11 has been completed. In the example shown in FIG. 2, it is checked whether or not the processing for all 24 extracted map elements has been completed. If it is determined in this step ST17 that the processing for all the map elements has not been completed, the sequence returns to step ST12, the next map element is selected from the map elements extracted in step ST11, and the sequence An identifier for the selected map element is determined. Thereafter, the above-described processing is repeated. If it is determined in step ST17 that processing for all map elements has been completed in the middle of this repeated processing, the usage history information addition and update processing ends.

  Next, map display processing using the usage history information will be described with reference to the flowchart shown in FIG.

  The map display device according to the first embodiment of the present invention has “default display mode”, “history display mode”, and “white map display mode” as map display modes.

  The default display mode is a normal mode in which a map is displayed with a predetermined shape, size, color, etc. without highlighting map elements.

  The history display mode is a mode for displaying a map with emphasis on map elements registered as usage history information. The method of emphasizing map elements is to change the line thickness, size, color, brightness, shape, level of detail, and transparency of the display parts that represent the map elements, blink the display parts, or turn on the display parts. It is possible to use a method such as deforming or switching between display and non-display of the display component.

  The white map display mode is a mode in which a map is displayed by deleting other map elements registered as usage history information.

  In the map display process, first, a display mode is set (step ST20). The setting of the display mode is performed when the user inputs the map display mode from the input unit 2. When the history display mode is set as the display mode in step ST20, display highlighting can be further set (not shown in the flowchart of FIG. 6). In this display emphasis setting, for example, the road used in the past month is thickened, the facility is set to be displayed large, only the map element having a usage frequency (reference count) of 10 or more is used, and used on Sunday It is possible to make settings such as blinking display only for facilities with

  Next, the display mode is determined (step ST21). That is, the display control unit 8 examines the input data sent from the input unit 2 to determine which of the default display mode, the history display mode, and the white map display mode is designated as the display mode.

  If it is determined in step ST21 that the display mode is the default display mode, a default display mode process is executed (step ST22). In this default display mode processing, the display control means 8 does not use the usage history information registered in the usage history storage means 4 and displays the map data acquired from the map information acquisition means 3 as map display data as it is. Send to 9. Thereafter, the sequence proceeds to step ST25, where map display processing is executed. In this map display process, the display means 9 draws a map based on the map display data sent from the display control means 8.

  Through the default display mode processing described above, the display unit 9 displays a normal map (a map that is not highlighted) as shown in FIG. 7 based on the map data including the map elements shown in FIG. .

  If it is determined in step ST21 that the history display mode is set, a history display mode process is executed (step ST23). Although details will be described later in this history display mode process, a process of emphasizing and displaying map elements according to the usage history information is performed. At this time, if display emphasis is set, display according to the setting is performed. Thereafter, the sequence proceeds to step ST25, where map display is performed.

  Through the history display mode processing described above, the display means 9 has a map that is highlighted as shown in FIG. 8 based on, for example, the map data including the map elements shown in FIG. 2 and the usage history information shown in FIG. Is displayed. In the map shown in FIG. 8, roads (road 8, road 7, road 5 and road 3) and facility 6 (station building) registered as usage history information are drawn with thick lines, and home 1, facility 3 (gasoline). A stand, a facility 8 (post office), a facility 4 (parking lot), and a facility 5 (supermarket) are depicted greatly.

  If it is determined in step ST21 that the mode is the white map display mode, a white map display mode process is executed (step ST24). Details of this blank map display mode processing will be described later. Thereafter, the sequence proceeds to step ST25, where map display is performed.

  Through the above white map display mode processing, the display means 9 is registered as usage history information as shown in FIG. 9 based on, for example, map data including the map elements shown in FIG. 2 and usage history information shown in FIG. Road (road 8, road 7, road 5 and road 3), home 1, facility 8 (post office), facility 3 (gas station), facility 4 (parking lot), facility 5 (supermarket) and facility 6 (station building) ) Is drawn, and the map with the other map elements deleted is displayed.

  Next, details of the history display mode process executed in step ST23 of the map display process (see FIG. 6) will be described with reference to the flowchart shown in FIG.

  In the history display mode process, first, a map element is acquired (step ST30). That is, the display control means 8 acquires map data from the map information acquisition means 3 and extracts map elements included in the map data. In the example shown in FIG. 2, 24 map elements such as road 1 to road 13, home 1, facility 1 to facility 8, railway, and background 1 are extracted.

  Next, usage history information is acquired (step ST31). That is, the display control unit 8 acquires usage history information as shown in FIG. 3 from the usage history storage unit 4. Next, it is checked whether usage history information exists (step ST32). Specifically, the display control means 8 checks whether or not the same map element as the map element acquired in step ST30 exists in the usage history information acquired in step ST31.

  If it is determined in step ST32 that the same map element as the map element acquired in step ST30 exists in the usage history information acquired in step ST31, a highlighting process is performed (step ST33). That is, the display control unit 8 changes the map element in accordance with the display emphasis setting from the input unit 2 in advance and causes the display unit 9 to display the map element. Thereafter, the sequence proceeds to step ST35.

  If it is determined in step ST32 that the same map element as that acquired in step ST30 does not exist in the usage history information acquired in step ST31, normal default display processing is performed (step ST34). That is, the display control unit 8 displays the map element on the display unit 9 without changing the map element, that is, as it is. Thereafter, the sequence proceeds to step ST35.

  In step ST35, it is checked whether or not the processing for all the map elements acquired in step ST30 has been completed. Here, if it is determined that the processing for all the map elements has not been completed, the sequence returns to step ST32 and the above-described processing is repeated. If it is determined in step ST35 that all the map elements have been processed, the history display mode process ends.

  Through the above history display mode processing, the display means 9 can be used as shown in FIG. 8, based on the map data including the map elements shown in FIG. 2 and the usage history information shown in FIG. A map highlighting the roads and facilities to be used is displayed.

  Next, details of the white map display mode process executed in step ST24 of the map display process (see FIG. 6) will be described with reference to the flowchart shown in FIG.

  In the white map display mode, map elements that are not registered in the usage history information are hidden, and map elements that are registered in the usage history information are displayed by default.

  In the white map display mode process, first, a map element is acquired (step ST40). That is, the display control means 8 acquires map data from the map information acquisition means 3 and extracts map elements included in the map data. In the example shown in FIG. 2, 24 map elements such as road 1 to road 13, home 1, facility 1 to facility 8, railway, and background 1 are extracted.

  Next, usage history information is acquired (step ST41). That is, the display control unit 8 acquires usage history information as shown in FIG. 3 from the usage history storage unit 4. Next, it is examined whether usage history information exists (step ST42). Specifically, the display control means 8 checks whether or not the same map element as the map element acquired in step ST40 exists in the usage history information acquired in step ST41.

  If it is determined in step ST42 that the same map element as that acquired in step ST40 is present in the usage history information acquired in step ST41, a default display process is performed (step ST43). That is, the display control unit 8 displays the map element on the display unit 9 without changing the map element, that is, as it is. Thereafter, the sequence proceeds to step ST45.

  If it is determined in step ST42 that the same map element as that acquired in step ST40 does not exist in the usage history information acquired in step ST41, a non-display process is performed (step ST44). That is, the display control unit 8 does not display the map element on the display unit 9. Thereafter, the sequence proceeds to step ST45.

  In step ST45, it is checked whether or not the processing for all the map elements acquired in step ST40 has been completed. Here, if it is determined that the processing for all map elements has not been completed, the sequence returns to step ST42, and the above-described processing is repeated. If it is determined in step ST45 that all the map elements have been processed, the white map display mode process ends.

  Through the above white map display mode processing, the display means 9 is often configured as shown in FIG. 9 based on the map data including the map elements shown in FIG. 2 and the usage history information shown in FIG. Only the roads and facilities to be used are drawn, and a map in which other map elements are deleted is displayed.

  In the above-described white map display mode, the map elements in which the usage history information is registered are configured to be displayed by default. However, the map elements in which the usage history information is registered may be highlighted. . In this case, what is necessary is just to change the process in step ST43 of the flowchart shown in FIG. Further, when the white map display mode is set in the display mode setting, it can be configured to set whether the map element is displayed in default or highlighted. According to this configuration, convenience is further improved.

  As described above, according to the map display device according to the first embodiment of the present invention, the usage history storage unit uses the usage status of the map element included in the map data acquired from the map information acquisition unit 3 as the usage history information. 4, the display control means 8 is configured to change the map element according to the use history information stored in the use history storage means 4 and display it on the display means 9. A specific map element can be highlighted and displayed in accordance with the usage status of the. As a result, the visibility of the map can be improved.

  The map display device according to the first embodiment operates in the history display mode, so that the map element that has been used in the past by the use history information stored in the use history storage unit 4 is displayed. Since the map element can be emphasized and displayed on the display means 9, the visibility of the map can be improved.

  In addition, the map display device according to the first embodiment is operated in the white map display mode, so that map elements that have been used in the past by the use history information stored in the use history storage unit 4 are shown. Since map elements other than can be deleted and displayed on the display means 9, the visibility of the map can be improved.

  Further, the map display device according to the first embodiment deforms and displays on the display means the map elements that have been shown to have been used in the past by the use history information stored in the use history storage means 4. be able to. As a result, although frequently used roads such as the vicinity of homes and the vicinity of frequently visited facilities may be annoying when displayed in detail, roads and facilities that are frequently used, names of nearby places, etc. are simplified or prominent Eliminating it can eliminate the annoyance. Conversely, roads and facilities that are frequently used, names of places in the vicinity, and the like can be emphasized and used as landmarks for map display. In this case, recognition of the current position can be enhanced.

  The map display device according to the first embodiment described above can be modified as follows. In other words, the display control unit 8 notifies the route search unit 5 of the use history information stored in the use history storage unit 4, and the route search unit 5 automatically selects roads and facilities that are frequently used by the user. A route search can be performed by registering as a destination candidate. According to this configuration, it is possible to provide a function such as a history priority route search that uses a familiar road as much as possible. Further, it is possible to register the waypoints and destinations used in the search by the route search means 5 in the usage history storage means 4 as usage history information.

  Similarly, the display control means 8 notifies the location search means 6 of the usage history information stored in the usage history storage means 4, and the location search means 6 uses facilities often used by the user when displaying the search results. Can be configured to be highlighted. Moreover, it can comprise so that the point utilized by point search may be registered into the utilization log | history memory means 4 as utilization log information.

  Further, the route search means 5 and the point search means 6 are linked to extract the genre of the frequently used facility from the use history information, and when the route search is executed, the facilities around the route are searched for the facilities of the same genre. It is also possible to configure such that a route search is performed by using a selected route as a transit point. According to this configuration, the route through the facility that matches the user's preference is automatically searched even if the user does not designate it as a waypoint, so that convenience is improved.

  In the map display device according to the first embodiment and the modification thereof described above, the usage history storage unit 4 is configured to store one set of usage history information, but a plurality of users corresponding to a plurality of users, respectively. It can be configured to register usage history information. According to this configuration, each user can use the usage history information corresponding to his / her range of action, so that the display unit 9 can display a map in a mode optimized for each individual.

It is a block diagram which shows the functional structure of the map display apparatus which concerns on Embodiment 1 of this invention. It is a figure which shows an example of the map element used with the map display apparatus which concerns on Embodiment 1 of this invention. It is a figure which shows an example of the utilization log information used with the map display apparatus which concerns on Embodiment 1 of this invention. It is a block diagram which shows the hardware structure of the map display apparatus which concerns on Embodiment 1 of this invention. It is a flowchart which shows the detail of the use history information addition and update process performed with the map display apparatus which concerns on Embodiment 1 of this invention. It is a flowchart which shows the detail of the map display process using the utilization history information performed with the map display apparatus which concerns on Embodiment 1 of this invention. It is a figure which shows an example of the map displayed by default display mode in the map display apparatus which concerns on Embodiment 1 of this invention. It is a figure which shows an example of the map displayed in the history display mode in the map display apparatus which concerns on Embodiment 1 of this invention. It is a figure which shows an example of the map displayed in the white map display mode in the map display apparatus which concerns on Embodiment 1 of this invention. It is a flowchart which shows the detail of the log | history display mode process performed with the map display apparatus which concerns on Embodiment 1 of this invention. It is a flowchart which shows the detail of the white map display mode process performed with the map display apparatus which concerns on Embodiment 1 of this invention.

Explanation of symbols

  1 position detection means, 2 input means, 3 map information acquisition means, 4 usage history storage means, 5 route search means, 6 point search means, 7 time / day of the week detection means, 8 display control means, 9 display means, 21 position detection Unit, 22 operation unit, 23 data storage unit, 24 control unit, 25 display unit, 31 input circuit, 32 memory, 33 CPU, 34 output circuit.

Claims (6)

Map information acquisition means for acquiring map data;
Display means for displaying a map based on map elements included in the map data acquired by the map information acquisition means;
Usage history storage means for storing the usage status of map elements included in the map data acquired by the map information acquisition means as usage history information;
A map display device comprising: display control means for changing a map element in accordance with the use history information stored in the use history storage means and causing the display means to display the map element.   The display control means highlights the map element that has been used in the past by the use history information stored in the use history storage means and displays the map element on the display means with emphasis over other map elements. The map display device according to claim 1.   The display control means deletes map elements other than the map elements that have been shown to have been used in the past by the use history information stored in the use history storage means, and displays them on the display means. Item 2. The map display device according to Item 1.   2. The display control unit according to claim 1, wherein the display unit deforms and displays on the display unit the map elements that are shown to have been used in the past by the usage history information stored in the usage history storage unit. Map display device.   Route search means for calculating a point candidate including a transit point and a destination based on the use history information stored in the use history storage means and searching for a route using the calculated point candidate is provided. The map display device according to claim 1. A point search means for searching for points is provided.
The display control means highlights a frequently used spot on the display means based on the use history information stored in the use history storage means among the spots searched by the spot search means. The map display device according to claim 1.

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