JP6483421B2 - In-vehicle device - Google Patents

Description

  The present invention relates to an in-vehicle device.

  As a background art in this technical field, there is JP 2010-85199 A (Patent Document 1). This gazette states that “if the scale of the map displayed on the display means is small, each facility is indicated where there is a certain number or more of the same type of facility in a predetermined area on the displayed map. Instead of the icon, a representative icon that represents the facility icon of the same type is displayed. When the scale of the map displayed on the display means is large, an icon indicating each facility is displayed instead of the representative icon. Is described.

JP 2010-85199 A

In Patent Document 1, the visibility of the icons can be improved, but in a predetermined case, the icons displayed on the map change, and there is a problem in the accuracy of information.
The present invention has been made in view of the above-described circumstances, and for an in-vehicle device that displays an icon of a facility on a map, improving the visibility of the icon while maintaining the accuracy of information based on the icon. Objective.

In order to achieve the above object, the in-vehicle device of the present invention includes a storage unit that stores map information relating to a map, and map data having facility information in which a position of the facility is associated with an icon indicating the facility, a display unit for displaying a map based on the map information, based on the facility information, the position on the map corresponding to the position of the facility, and a control unit for displaying the icon, the storage unit, the stores the scale of the map displayed by the display unit, the overlap determination ratio is determined ratios for the display of the icons in the overlap of the same of the icons together, the ratio determination information is marked with corresponding, wherein the control unit, the when the map display unit displays are flat map, upon display of the icon of the facility, if the same the icons overlap, it heavy is the ratio of the overlap of the icons among Get the ratio, the overlap ratio obtained is, if corresponding to the scale factor of the planar map over the overlap determining the ratio has the ratio judging information, characterized in that it does not display any one of the icons.

  ADVANTAGE OF THE INVENTION According to this invention, the visibility of an icon can be improved, maintaining the accuracy of the information based on an icon about the vehicle-mounted apparatus which displays the icon of a facility on a map.

It is a functional block diagram of the navigation apparatus concerning this embodiment. It is a figure which shows an example of the conventional facility display mode. It is a flowchart which shows operation | movement of the navigation apparatus concerning this embodiment. It is a figure which shows an example of facility data. It is a figure which shows an example of a ratio determination table. It is a figure which shows typically the icon developed to a virtual buffer in the aspect suitable for description. It is a figure utilized for description of a process when expanding an icon. It is a figure which shows an example of the facility display mode in connection with this embodiment. It is a figure which shows an example of a bird's-eye view display.

  FIG. 1 is a functional block diagram of a navigation device 1 (on-vehicle device) according to the present embodiment.

  The navigation device 1 is an in-vehicle device mounted on a vehicle, and displays a map, a current position of the vehicle on the map, a route search to a destination, a route guidance, and the like in accordance with a user's operation on the vehicle. Perform the function. In addition, the navigation apparatus 1 may be fixed to a dashboard of the vehicle or the like, or may be detachable from the vehicle.

  As shown in FIG. 1, the navigation device 1 includes a control unit 2, a storage unit 3, a touch panel 4 (display unit), a GPS reception unit 5, a relative orientation detection unit 6, a vehicle information acquisition unit 7, Is provided.

  The control unit 2 includes a CPU, a ROM, a RAM, other control circuits, and the like, and controls each unit of the navigation device 1.

  The storage unit 3 includes a hard disk, a nonvolatile memory such as an EEPROM, and stores data in a rewritable manner. In addition to the control program executed by the control unit 2, the storage unit 3 stores map data 3a and a ratio determination table T (ratio determination information). The ratio determination table T will be described later.

  The map data 3a includes map image data used when displaying a map on the touch panel 4, information on nodes indicating intersections and other connection points on the road network, and information on links indicating road sections between nodes. It has map information about the map, such as information about the names of administrative divisions and facilities on the map.

  The control unit 2 can display a map on the touch panel 4 to be described later based on the map data 3a. When displaying the map, the control unit 2 can display the map by changing the scale ratio in five stages from the first scale ratio to the fifth scale ratio in order from the smallest scale ratio. The first scale ratio is a scale ratio that represents the actual 1 km in a predetermined unit (for example, a unit corresponding to 1 cm) on the map. The second scale ratio is a scale ratio that represents actual 500 m in a predetermined unit on the map. The third scale ratio is a scale ratio that represents the actual 200 m in a predetermined unit on the map. The fourth scale ratio is a scale ratio that represents actual 100 m in a predetermined unit on the map. The fifth scale ratio is a scale ratio that represents actual 50 m in a predetermined unit on the map.

  The map data 3a has facility information. The facility information is information for storing a record regarding the facility for each facility located on the map based on the map information. Each record has at least a facility ID, facility location information indicating the location of the facility, facility type information indicating the type of facility, icon ID, and icon data.

  The facility ID is identification information for identifying the facility, and the value is different for each facility. Facility location information is information that represents the location of a facility in terms of longitude and latitude. The facility type information indicates the type (genre) of facilities such as convenience stores and restaurants. The icon ID is icon identification information when a facility is represented by an icon on a map in a facility display mode to be described later. The icon ID has a different value for each icon. Icon data is image data of an icon. In the present embodiment, the size of the icon data is 32 dots long × 32 dots wide.

  The touch panel 4 includes a display panel 4a and a touch sensor 4b. The display panel 4a is configured by a liquid crystal display, an EL (Electro Luminescent) display, or the like, and displays various types of information on the display panel 4a under the control of the control unit 2. The touch sensor 4b is arranged so as to overlap the display panel 4a, detects a user's touch operation, and outputs it to the control unit 2.

  The GPS receiver 5 receives GPS radio waves from GPS satellites via the GPS antenna 5a, and obtains the position coordinates indicating the current position of the vehicle and the traveling direction from the GPS signals superimposed on the GPS radio waves by calculation. The GPS receiver 5 outputs the acquisition result to the controller 2.

  The relative orientation detection unit 6 includes a gyro sensor and an acceleration sensor. The gyro sensor is constituted by, for example, a vibrating gyroscope and detects a relative direction (for example, a turning amount in the yaw axis direction) of the host vehicle. The acceleration sensor detects acceleration acting on the host vehicle (for example, tilt of the host vehicle with respect to the traveling direction). The relative orientation detection unit 6 outputs the detection result to the control unit 2.

  The control unit 2 includes information indicating the position coordinates and the traveling direction input from the GPS receiving unit 5, relative azimuth information of the vehicle input from the relative azimuth detecting unit 6, and map data stored in the storage unit 3. The position of the vehicle is specified based on the information included in 3a.

  Incidentally, the navigation device 1 has a facility display mode as an operation mode. In the facility display mode, the type of facility is input by the user, and an icon indicating the facility corresponding to the input type is displayed at the location of the facility on the map.

  Here, the conventional facility display mode has the following problems.

  FIG. 2 is a diagram illustrating an example of a display screen displayed on the touch panel 4 in the conventional facility display mode.

  The scale of the map shown in FIG. 2 is the first scale. In FIG. 2, a convenience store is input as the type of facility by the user when shifting to the facility display mode. In FIG. 2, icons of facilities located in an area belonging to a predetermined range centered on the position M of the vehicle are displayed on the map. However, icons of facilities located in the entire area of the displayed map are displayed on the map. It may be displayed above.

  As shown in FIG. 2, in the facility display mode, the facility icon corresponding to the input type is displayed at a position on the map corresponding to the actual location of the facility. As shown in FIG. 2, when there are a large number of facility icons to be displayed, a plurality of icons overlap, it is difficult to see some icons, and it is difficult to grasp the position of the map corresponding to the icons. Arise. Such a situation can occur as the scale of the map to be displayed is smaller.

  Based on the above, the navigation device 1 of the present embodiment performs the operations described below.

  FIG. 3 is a flowchart showing the operation of the navigation device 1 according to the present embodiment.

  In the following description, an area for displaying the facility icon when the facility display mode is entered is referred to as an “icon display area”. In the present embodiment, the icon display area is a predetermined area centered on the current position of the vehicle. The size of the icon display area changes according to the scale of the map. When the shift to the facility display mode is instructed, the control unit 2 calculates an icon display area based on the map scale ratio and the current position of the vehicle.

As shown in FIG. 3, the control unit 2 of the navigation device 1 accepts an instruction to shift to the facility display mode (step S1). As described above, the user inputs the type of facility displayed on the map when shifting to the facility display mode.
When the transition to the facility display mode is instructed, the control unit 2 corresponds to the facility of the type input by the user that belongs to the icon display area among the records included in the facility information included in the map data 3a. A record is specified, and facility data SD composed of the specified record is generated (step S2). In step S2, the control unit 2 generates facility data SD in which records are stored according to the storage order of the records stored in the facility information.

  Hereinafter, a facility that belongs to the icon display area and is of the type input by the user is expressed as a “display target facility”.

  FIG. 4 is a diagram illustrating an example of the facility data SD.

  The facility data SD has a record for each display target facility. As shown in FIG. 4, one record of the facility data SD has a facility ID, facility position information, facility type information, icon ID, and icon data. As in the record R1 and the record R2 in FIG. 4, in the facility data SD, a plurality of records may have the same icon ID. This means that the display target facilities corresponding to each record are the same facility. For example, in the case of a convenience store, the same facility indicates that each display target facility is a store belonging to the same franchisor.

  Returning to the explanation of the flowchart, after the control unit 2 creates the facility data SD, is the map displayed on the touch panel 4 a bird's eye view display map that displays the planar map obliquely looking down from a predetermined viewpoint? It is determined whether or not (step S3). When the map displayed on the touch panel 4 is a bird's eye view display map (step S3: YES), the control unit 2 executes the process of step S4. The process of step S4 will be described later.

  On the other hand, when the map displayed on the touch panel 4 is not a bird's eye view display map (step S3: NO), that is, when the map displayed on the touch panel 4 is a planar map, the control unit 2 controls the touch panel 4. The scale ratio of the displayed map is acquired (step S5).

  Next, the control unit 2 determines whether or not to display an icon indicating a facility on the map based on the map scale ratio acquired in step S4 from the ratio determination table T stored in the storage unit 3. The overlap determination ratio to be used is acquired (step S6). The overlap determination ratio will be described in detail later.

  FIG. 5 is a diagram illustrating an example of the ratio determination table T. As illustrated in FIG.

  As illustrated in FIG. 5, the ratio determination table T includes a field F1 that stores information indicating the scale ratio of a map displayed on the touch panel 4 and a field F2 that stores an overlap determination ratio. Also, as shown in FIG. 5, in each record of the ratio determination table T, the map scale ratio and the overlap determination ratio correspond to each other, and the overlap determination ratio decreases as the map scale ratio decreases. Is set to That is, when the map displayed on the touch panel 4 is a wide area map, the overlap determination ratio is set low, and when the map is a narrow area map, it is set high. Note that the scale ratio and the overlap determination ratio included in the ratio determination table T are set to appropriate values from the viewpoint of “easy to see for the user” based on prior simulations, tests, and the like.

  For example, when the scale ratio of the displayed map is the fourth scale ratio, the control unit 2 refers to the record in which the fourth scale ratio is stored in the field F1 of the ratio determination table T, and the overlap determination ratio “60”. % ".

  When acquiring the overlap determination ratio from the ratio determination table T, the control unit 2 sets one record that has not yet been processed among the records stored in the facility data SD as the processing target, and sets one record as the processing target. Read (step S7). Thereafter, the control unit 2 reads the records of the facility data SD in step S7 as processing targets one by one in the order of storage, and executes the processing from step S8 onward based on the read records.

  Hereinafter, the record read in step S7 is referred to as a “processing target record”.

  When the processing target record is read in step S7, the controller 2 determines that the icon of the corresponding facility is displayed on the map based on the processing target record, and the icon that has already been determined to be displayed, step S6. It is determined whether or not they overlap at a ratio that exceeds the overlap determination ratio acquired in (Step S8). Hereinafter, the process of step S8 and the process of step S9 which is a process executed based on the process result of step S8 will be described in detail.

  In step SB8, the control unit 2 executes a process of expanding icon data in the virtual buffer KB based on the processing target record by a predetermined method. The virtual buffer KB is a virtual storage area for expanding icon data of icons displayed on the display panel 4a. More specifically, the virtual buffer KB displays information on colors (for example, information indicating R, G, and B with tone values of a predetermined tone) in a manner according to the resolution of the display panel 4a in a predetermined coordinate system. This is a rectangular storage area in which the dots D to be held are developed. The position of each dot D can be uniquely specified by the coordinates in the coordinate system.

  The icon data developed in the virtual buffer KB is superimposed on the map image data developed in a real buffer such as a VRAM. A drive circuit of the display panel 4a (not shown) drives the display panel 4a based on image data (data obtained by superimposing icon data on map image data) developed in an actual buffer. As a result, the icon is displayed on the map displayed on the display panel 4a.

  Hereinafter, the process of expanding icon data based on the first record of the facility data SD will be described in the virtual buffer KB, and then the icon data is expanded based on the second and subsequent records of the facility data SD. Processing to be performed will be described.

<Description of processing for expanding icon data based on the first record>
First, regarding the process in the case where the icon data is expanded in the virtual buffer KB based on the first record, the case where the record R1 (first record) of the facility data SD in FIG. An example will be described.

  FIG. 6 is a diagram schematically showing icon data I1 developed in the virtual buffer KB based on the record R1 stored in the facility data SD shown in FIG. 4 in a mode suitable for explanation.

  When the control unit 2 expands the icon data based on the first record in the virtual buffer KB, the control unit 2 acquires facility position information and icon data included in the record. For example, when the processing target record is the record R1, the control unit 2 acquires facility position information and icon data I1 included in the record R1.

  Next, the control unit 2 converts the acquired facility position information into coordinates in the coordinate system of the virtual buffer KB. Conversion from the facility position information to the coordinates is appropriately performed by a predetermined algorithm reflecting the state of the currently displayed map, the scale of the map, and the like. For example, when the processing target record is the record R1, the control unit 2 converts the facility position information included in the record R1 into coordinates S1 (see FIG. 6).

  Next, the control unit 2 sets “0%” as the overlap ratio when the icon data I1 is developed in the virtual buffer KB so that the center dot of the lower side of the acquired icon data I1 is positioned at the converted coordinate S1. To get. The overlap ratio will be described in detail later. If there is an overlapping portion between the icon data based on the processing target record and the icon data that has already been developed in the virtual buffer KB, each icon corresponds to the entire icon data. It is a ratio indicating how much overlap. When the icon data based on the first record is expanded in the virtual buffer KB, the other icon data is not expanded in the virtual buffer KB. Therefore, when the icon data based on the first record is expanded, the control unit 2 The overlap ratio acquired by is “0%”.

  Next, the control unit 2 determines whether or not the acquired overlap ratio exceeds the overlap determination ratio acquired in Step S6 (Step S8). Since the overlap ratio is “0%”, the overlap ratio is smaller than the overlap determination ratio regardless of the map scale ratio. Therefore, the control part 2 transfers a process sequence to step S9.

  In step S9, the control unit 2 expands the icon data I1 in the virtual buffer KB so that the center dot of the lower side of the icon data I1 of the processing target record is positioned at the converted coordinate S1 (step S9). As a result, as shown in FIG. 6, the icon data I1 is expanded in the virtual buffer KB. Note that the size of the icon developed in the virtual buffer KB is not changed depending on the scale of the map displayed on the touch panel 4 and is developed at a fixed size (32 dots in the vertical direction × 32 dots in the horizontal direction in the present embodiment).

<Description of processing for expanding icon data based on second and subsequent records>
Next, the process when the icon data is expanded in the virtual buffer KB based on the second and subsequent records will be described as an example where the record R2 of the facility data SD in FIG. .

  FIG. 7 is a diagram used for explaining the processing when the icon data I2 is expanded in the virtual buffer KB based on the record R2 stored in the facility data SD shown in FIG.

  When expanding the icon data based on the second and subsequent records in the virtual buffer KB, the control unit 2 acquires facility location information and icon data that the record has. Next, the control unit 2 converts the acquired facility position information into coordinates in the coordinate system of the virtual buffer KB. For example, when the second and subsequent records to be processed are the record R2, the control unit 2 acquires the facility location information and icon data I2 included in the record R2, and coordinates the acquired facility location information as coordinates. It converts into S2 (refer FIG. 7).

  Next, when the icon data is expanded in the virtual buffer KB so that the dot at the center of the lower side of the icon data is located at the converted coordinates, the control unit 2 has a portion overlapping with the already expanded icon data. It is determined whether or not there is. When the second and subsequent records to be processed are the record R2, the control unit 2 overlaps the already developed icon data I1 when the icon data I2 is developed at a position corresponding to the coordinate S2. Determine if there is a part.

  When there is no overlapping portion, the control unit 2 acquires “0%” as the overlap ratio.

  When there is an overlapping portion, the control unit 2 calculates the overlap ratio by the following method. First, the control unit 2 uses icon IDs of already developed icon data (hereinafter referred to as “existing icon data”) having overlapping portions and icon data based on the processing target record (hereinafter referred to as “processing target icon data”). .) Is compared with the icon ID. The icon ID of the existing icon data is stored in a predetermined storage area in association with the position where the existing icon data is expanded when the control unit 2 expands the existing icon data in the virtual buffer KB.

  When the icon ID of the existing icon data is different from the icon ID of the processing target icon data, the control unit 2 acquires “0%” as the overlap ratio. In this case, in step S9 described later, the processing target icon data is expanded in the virtual buffer KB regardless of the state of the existing icon data.

  When the icon ID of the existing icon data and the icon ID of the processing target icon data are the same, the control unit 2 calculates and acquires the overlap ratio. Hereinafter, the calculation method of the overlap ratio will be specifically described with reference to FIG.

  In the example of FIG. 7, the icon data I1 based on the record R1 is already developed in the virtual buffer KB as existing icon data. The icon data I2 based on the record R2 is the processing target icon data. When the icon data I2 is expanded, there is a portion that overlaps the icon data I1.

  In the example of FIG. 7, the control unit 2 specifies an area AK that is an area overlapping the icon data I1 when the icon data I2 is expanded. Next, the control unit 2 acquires the number of dots belonging to the area AK (hereinafter referred to as “overlapping dot number”). The acquired number of dots is the number of dots that overlap with the icon data I1 when the icon data I2 is expanded. Next, the control unit 2 calculates a ratio (percentage) of the number of overlapping dots to the total number of tods constituting the icon data (in this example, 32 × 32 = 1024). The value calculated as described above is the overlap ratio. When there is a portion that overlaps the existing icon data that has already been expanded when the processing target icon data is expanded in the virtual buffer KB, the overlapping ratio indicates the ratio of the overlapping portion to the entire icon data. It is information to show.

  After acquiring the overlap ratio as described above, the control unit 2 determines whether or not the acquired overlap ratio exceeds the overlap determination ratio acquired in step S6 (step S8).

  For example, it is assumed that the scale ratio of the map displayed on the touch panel 4 is the fourth scale ratio, and the control unit 2 acquires the overlap determination ratio corresponding to the scale ratio as “60%” from the ratio determination table T. In addition, when the icon data I2 is expanded in the virtual buffer KB, the icon data I1 and the icon data I2 are overlapped so as to generate an area AK of vertical Y17 dots × horizontal X10 dots. In this case, the overlap ratio is “16.6%”, and the control unit 2 determines in step S8 that the overlap ratio does not exceed the overlap determination ratio acquired from the ratio determination table T.

  Further, for example, it is assumed that the scale of the map displayed on the touch panel 4 is the first scale, and the control unit 2 acquires the overlap determination ratio corresponding to the scale from the ratio determination table T as “10%”. Further, when the icon data I2 is expanded in the virtual buffer KB, the icon data I1 and the icon data I2 are overlapped so as to generate an area AK of vertical Y30 dots × horizontal X28 dots. In this case, the overlap ratio is “82.0%”, and the control unit 2 determines that the overlap ratio exceeds the overlap determination ratio acquired from the ratio determination table T in step S8.

  When the acquired overlap ratio exceeds the overlap determination ratio acquired in step S6 (step S8: YES), the control unit 2 moves the processing procedure to step S10. In this case, the processing target icon data is not expanded in the virtual buffer KB, and therefore an icon based on the icon data is not displayed on the display panel 4a. Thereby, the following effects are produced. That is, when the processing target icon data overlaps the existing icon data exceeding the overlap determination ratio defined according to the map scale ratio, the icon based on the processing target icon data is not displayed on the map. Thereby, it is possible to relieve the difficulty in seeing the icons and the difficulty in seeing the map due to the same icons being displayed on the map. If the icon based on the processing target icon data is not displayed, the same icon is displayed at a position very close to the position where the icon based on the processing target icon data was supposed to be displayed. Therefore, the user can recognize that the corresponding facility exists at the position corresponding to the icon by referring to the icon based on the existing icon data displayed on the map, and the usefulness of the information obtained by the user is reduced. do not do.

  On the other hand, when the acquired overlap ratio does not exceed the overlap determination ratio acquired in step S6 (step S8: NO), the control unit 2 moves the processing procedure to step S9. In step S9, the control unit 2 expands the processing target icon data in the virtual buffer KB. When there is a portion overlapping with the existing icon data, the control unit 2 superimposes (overwrites) the existing icon data on the overlapping portion with the processing target icon data.

  As described above, even when there is an overlapping portion between the existing icon data and the processing target icon data, if the icon IDs of these icon data are different, the icon based on the processing target icon data is not displayed. . Accordingly, it is possible to prevent a situation in which the icon is not displayed even though the same icon is not displayed at a close position, and it is possible to prevent the usefulness of the information acquired by the user from being impaired.

  In addition, even when there is an overlapping portion between the existing icon data and the processing target icon data, if the overlapping ratio does not exceed the overlapping determination ratio defined according to the map scale ratio, the processing target icon data An icon based on is displayed. Thereby, it can prevent that the icon which should be displayed is no longer displayed by the relationship with the position of the facility on a map, suppressing that it becomes difficult to see an icon and a map resulting from the excessive overlap of an icon. .

  In step S10, the control unit 2 determines whether or not an unprocessed record remains in the facility data SD.

  When an unprocessed record remains (step S10: YES), the control unit 2 moves the processing procedure to step S7, and among the unprocessed records, one record according to the storage order is set as a process target record. The process based on the process target record is executed.

  On the other hand, when no unprocessed record remains (step S10: NO), the control unit 2 superimposes one or a plurality of icon data developed in the virtual buffer KB on the real buffer in which the map data 3a is developed. Expand (step S11). As a result, the facility icon is displayed on the map of the display panel 4a based on the image data developed in the real buffer by a drive circuit (not shown).

  FIG. 8 is a diagram illustrating an example of a facility display mode according to the present embodiment.

  The map shown in FIG. 8 is a map with a fourth scale ratio. As shown in FIG. 8, a plurality of icons indicating facilities are displayed on the map. The icon I10 and the icon I11 in the frame W shown in FIG. 8 are the same icon. The icon I11 is displayed so as to overlap the icon I10. As shown in FIG. 8, the icon I10 and the icon 111 are displayed so as to overlap with each other because the control unit 2 determines that the overlapping ratio of the icon data based on the icon I10 and the icon data based on the icon I11 is the first in step S8. This is because it is determined that the overlap determination ratio “60%” corresponding to the 4 scale ratio is not exceeded.

  Here, for example, suppose that the map shown in FIG. 8 is a map at the second scale with the position indicated by the pointer P as the center of the map displayed on the touch panel 4. As described above, as the map displayed on the touch panel 4 becomes a wide area map, that is, a map with a smaller scale ratio, the icons overlap each other. Therefore, the overlapping ratio between the icon I10 and the icon I11 is the same as the map of the fourth scale ratio. Compared to increase. Here, it is assumed that the overlapping ratio between the icon I10 and the icon I11 in the case of the map at the second scale is “40%”. In the case of the map of the fourth scale ratio, since the overlap determination ratio is “60%”, the icon I10 and the icon I11 are displayed so as to overlap, but in the case of the second scale ratio, the overlap determination ratio is “ 20% ", the control unit 2 determines that the overlap ratio exceeds the overlap determination ratio, and either the icon I10 or the icon I11 is not displayed on the map. Here, if the icon I11 is an icon based on a record read after the expansion of the icon data based on the icon I10, the control unit 2 does not display the icon I11 on the map. As described above, the control unit 2 changes the determination on the display of the icon on the map, that is, the determination on the development to the virtual buffer KB, according to the scale ratio of the map. This is because, as shown in the ratio determination table T shown in FIG. 5, the overlap determination ratio varies depending on the map scale ratio.

  As described above, the overlap determination ratio is set lower as the map scale ratio is smaller, and is set higher as the map scale ratio is larger. Thereby, in the case of a narrow map, that is, a map with a large scale ratio, even if the same icons are somewhat overlapped, the control unit 2 displays the icons superimposed on the map. Therefore, the accuracy of information based on icons can be maintained. In particular, the accuracy of information based on icons can be maintained more compared to, for example, a mode in which overlapping icons are not displayed or the overlapping icons are replaced with one representative icon.

  On the other hand, when the map is a wide area, that is, when the map has a small scale ratio, since the overlap determination ratio is set low, even if the same icons overlap each other, the control unit 2 , Hide one of the icons. Thereby, the control unit 2 maintains the accuracy of the information based on the icons in the wide-area map, and it is difficult to see the icons or the map is difficult to see due to the same icons being displayed on the map. Can be eased and the visibility of icons and maps can be improved.

  Next, the process of step S4 in the flowchart of FIG. 3 will be described.

  The process of step S4 is a process executed when the control unit 2 determines in step S3 that the map displayed on the touch panel 4 is a bird's eye view display map (step S3: YES). When the map displayed on the touch panel 4 is a bird's eye view map, the control unit 2 does not perform the process of displaying or hiding the icons according to the overlapping ratio between the same icons described above, and the facility data All icons based on each record stored in the SD are displayed on the map.

  FIG. 9 is a diagram illustrating an example of a bird's eye view display.

  As described above, a bird's eye view map is a map that displays a planar map as if it is looked down obliquely from a predetermined viewpoint. The diagram shown in FIG. 9A shows an example of a bird's eye view display map displayed on the touch panel 4. Moreover, in the figure shown to FIG. 9 (A), the position M of a vehicle and the icon which shows a facility are displayed on the map of bird's-eye view display.

  FIG. 9B is an explanatory diagram for explaining a map of a bird's eye view display. The six lines L1 to L6 are arranged on a bird's eye view display map for each predetermined actual distance. In the bird's eye view map, the larger the actual distance between lines, the wider the map. As shown in FIG. 9B, the farther from the predetermined viewpoint, the closer the actual distance between the lines is, but the shorter the distance on the map. That is, in the bird's eye view display map, the actual distance between the distance on the map in the area close to the predetermined viewpoint and the distance on the map in the area far from the predetermined viewpoint differs. This is because the bird's eye view display map is displayed so as to look down on the plane map obliquely from a predetermined viewpoint.

  Here, as shown in FIG. 9B, it is assumed that an icon I21 and an icon I22 indicating a facility are displayed. As shown in FIG. 9B, each icon is displayed so that the icon I22 and the icon I21 overlap each other. Further, as shown in FIG. 9, the icon I21 is displayed on the line L1, and the icon I22 is displayed on the line L3. Further, the icon I21 and the icon I22 are the same icon (same icon ID).

  In this case, if any one of the overlapping icons is not displayed according to the overlapping ratio as described above, the convenience of the user is reduced for the following reason.

  In the planar map, when icons overlap, the facilities indicated by the icons are close to each other, so that the icons overlap. However, in the case of a bird's eye view display map, even if the icons overlap, they may actually be separated. For example, in FIG. 9B, it is assumed that the distance between each line is “250 m”. In this case, as shown in FIG. 9B, since the icon I21 is displayed on the line L1 and the icon I22 is displayed on the line L3, the actual separation distance of the facility indicated by the icon I21 and the icon I22 Is at least “500 m”. In this case, if the icon I22 is not displayed, the control unit 2 does not have the same facility (that is, the icon I22) as the icon I21 at a position closer to "500 m" than the icon I21 from the position M of the vehicle. The facility indicated by the icon I21 is presented to the user of the vehicle. Moreover, since the actual separation distance of the facility indicated by the icon becomes larger as the map of the bird's eye view display is wider, the control unit 2 presents a farther facility. Thus, in the case of a bird's eye view display map, if any one of the overlapping icons is hidden as described above, the convenience of the user is reduced.

  Accordingly, when the map displayed on the touch panel 4 is a bird's eye view display map, the control unit 2 does not perform the process of hiding the icons according to the overlapping ratio between the same icons, and is stored in the facility data SD. Display an icon based on each record on the map. As a result, the icon non-display process corresponding to the overlapping ratio between the same icons is superior as the process in the planar map.

  As described above, the navigation device 1 (on-vehicle device) of the present embodiment stores map data 3a having map information related to a map and facility information in which the position of the facility is associated with an icon indicating the facility. A storage unit 3, a touch panel 4 that displays a map based on map information, and a control unit 2 that displays an icon at a position on the map corresponding to the location of the facility based on the facility information. When displaying the icon of a facility, the control unit 2 acquires an overlapping ratio that is an overlapping ratio of icons when the same icon overlaps, and if the acquired overlapping ratio exceeds a predetermined determination ratio set in advance, Do not display either icon.

  Thereby, since the control part 2 does not display any one icon according to the overlapping ratio between icons when the same icon overlaps, it is easy to see the icon while maintaining the accuracy of the information based on the icon. Can be improved.

  In the navigation device 1 according to the present embodiment, the storage unit 3 corresponds to the scale ratio of the map displayed on the touch panel 4 and the overlap determination ratio that is a determination ratio related to the display of the icon in the overlap of the same icons. The attached ratio determination table T (ratio determination information) is stored, and the control unit 2 has an overlap ratio between the same icons in the ratio determination table T when the icons indicating the facilities overlap. If the overlap determination ratio is exceeded, either icon is not displayed.

  Thereby, the control part 2 performs the discrimination | determination of the display or non-display of the icon which considered the scale ratio of the map which the touchscreen 4 displays using the ratio determination table T, when discriminating regarding the display of an icon. Therefore, the control unit 2 can improve the visibility of the icon while maintaining the accuracy of the information based on the icon without depending on the scale of the map.

  In the navigation device 1 according to the present embodiment, the ratio determination table T is provided so that the overlap determination ratio varies depending on the scale ratio of the map displayed on the touch panel 4, and the control unit 2 displays an icon indicating a facility. When the same icon overlaps, when the overlap ratio between the same icons exceeds the overlap determination ratio corresponding to the scale ratio of the map displayed on the touch panel 4, one of the icons is not displayed.

  In the ratio determination table T, the overlap determination ratio is set higher as the map scale ratio is larger, and the overlap determination ratio is set lower as the map scale ratio is smaller. Thereby, in the case of a narrow map, that is, a map with a large scale ratio, even if the same icons are somewhat overlapped, the control unit 2 displays the icons superimposed on the map. Therefore, the accuracy of information based on icons can be maintained. In particular, the accuracy of information based on the icons can be maintained more compared with, for example, the non-display of overlapping icons or the display of replacing the overlapping icons with one representative icon. On the other hand, when the map is a wide area, that is, when the map is a map with a small scale ratio, since one of the overlapping icons is not displayed, the control unit 2 determines the accuracy of the information based on the icon. It is possible to improve the visibility of icons while maintaining the above.

  In the navigation device 1 according to the present embodiment, when the map displayed on the touch panel 4 is a planar map, the control unit 2 displays the same icon when the same icon overlaps when displaying the icon indicating the facility. If the overlap ratio by exceeds the overlap determination ratio corresponding to the scale ratio of the planar map, one of the icons is not displayed.

  In a bird's eye view map, the icons may overlap each other regardless of the actual distance between the facilities indicated by the icons. On the other hand, in the planar map, the facilities are close to each other, so that the icons overlap. For this reason, the control unit 2 maintains the accuracy of the information based on the icon to be displayed by hiding one of the same icons in the planar map, and is close to the hidden icon. An icon indicating the same facility can be displayed.

  The above-described embodiments are merely illustrative of one aspect of the present invention, and can be arbitrarily modified and applied without departing from the spirit of the present invention.

  For example, in the above-described embodiment, when the same icon overlaps, an icon based on a record read later from the facility data SD among the overlapping icons is set as an icon to be displayed or hidden. However, the present invention is not limited to this. For example, when the same icon overlaps while the vehicle is traveling on the route to the destination, the icon along the road that travels in the opposite direction of the vehicle travels in consideration of the vehicle travel direction. May be displayed or hidden.

  Further, for example, in the above-described embodiment, the vehicle-mounted type is exemplified as the navigation device 1, but the form of the navigation device 1 is arbitrary, and may be, for example, a portable device carried by a pedestrian.

1 Navigation device (on-vehicle device)
2 Control unit 3 Storage unit 3a Map data 4 Touch panel (display unit)
T ratio determination table (ratio determination information)

Claims (2)

A storage unit that stores map data including map information about a map, and facility information in which a facility position is associated with an icon indicating the facility;
A display unit for displaying a map based on the map information;
A control unit that displays the icon at a position on a map corresponding to the position of the facility based on the facility information;
The storage unit stores ratio determination information in which a scale ratio of a map displayed by the display unit is associated with an overlap determination ratio that is a determination ratio regarding display of the icon in the overlap of the same icons,
The controller is
When the map displayed by the display unit is a planar map,
When displaying the icon of the facility, when the same icon is overlapped, an overlapping ratio that is a ratio of overlapping of the icons is acquired, and the acquired overlapping ratio corresponds to the scale ratio of the planar map and the ratio When the determination information exceeds the overlap determination ratio, any one of the icons is not displayed. The ratio determination information is
According to the scale of the map displayed by the display unit, the overlap determination ratio is provided to be different,
The controller is
When displaying the icon of the facility, when the same icon overlaps, the overlapping ratio between the same icons exceeds the overlapping determination ratio corresponding to the scale ratio of the planar map displayed by the display unit , vehicle apparatus according to claim 1, characterized in that it does not display any one of the icons.

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