JP2008051538A - Vehicle-mounted map display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To display a map, with unnecessary parts covered, so as to be easy to use, even in a vehicle which is traveling on a recommended route. <P>SOLUTION: The part of the recommended route 22 and the vicinity of a guidance intersection on the recommended route 22 are set to be an enhancement range, and the parts other than the enhancement range of the map are masked. This displays a map screen in which the map can be seen brightly and clearly in the enhancement range and the map becomes invisible, by being covered with a black mask gradually as departing from the enhancement range. Furthermore, the size of the set enhancement range is changed, according to user operations. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a vehicle-mounted map display device that is mounted on a vehicle and displays a map, such as a navigation device.

  2. Description of the Related Art Conventionally, there is known a map display device that sets a circular or fan-shaped range around the position of a vehicle and covers a portion around the set range to display a map around the vehicle (see Patent Document 1). In this way, the user can easily grasp the sense of distance from the vehicle to each point on the map by covering the unnecessary portion and displaying the map.

JP 2004-317417 A

  In the map display device disclosed in Patent Document 1, a map is displayed in a range centered on the position of the vehicle, and the map is obscured in other portions. Therefore, when a recommended route to the destination is set and the vehicle is traveling according to the recommended route, the recommended route cannot be sufficiently confirmed on the map. As described above, the conventional map display device that covers the unnecessary portion and displays the map cannot display a map that is easy to use in the vehicle traveling along the recommended route.

The in-vehicle map display device according to the invention of claim 1 includes a map display means for displaying a map on a display monitor, an emphasis range setting means for setting a predetermined emphasis range around a recommended route on which the vehicle should travel, Masking means for displaying on the display monitor a mask for covering the map except for the emphasis range set by the emphasis range setting means.
According to a second aspect of the present invention, in the on-vehicle map display device according to the first aspect, the emphasis range setting means further sets the emphasis range around the guidance intersection where the vehicle should bend on the recommended route.
According to a third aspect of the present invention, in the on-vehicle map display device according to the first or second aspect, further includes an emphasis range changing means for changing the size of the emphasis range in accordance with a user operation.
According to a fourth aspect of the present invention, in the in-vehicle map display device according to any one of the first to third aspects, the facility icon for the facility type designated by the user is displayed in the same display form on the map regardless of the presence or absence of a mask. A facility icon display means is further provided.
According to a fifth aspect of the present invention, in the on-vehicle map display device according to any one of the first to fourth aspects, the masking means changes the display form of the mask according to the time zone.
According to a sixth aspect of the present invention, in the on-vehicle map display device according to any one of the first to fourth aspects, the masking means displays the mask only in a predetermined specific time zone.

  According to the present invention, it is possible to display a map while covering an unnecessary portion so as to be easy to use even in a vehicle traveling along a recommended route.

  FIG. 1 shows the configuration of a navigation device according to an embodiment of the present invention. This navigation device is mounted on a vehicle, and when a destination is set by a user, a recommended route to the destination is searched and the recommended route is displayed on a map. Then, the vehicle is guided to the destination according to the recommended route displayed on the map. At this time, the user can select either a normal map display mode for performing normal map display or a focus map display mode for performing map display while covering unnecessary portions.

  The navigation device 1 shown in FIG. 1 includes a control circuit 11, a ROM 12, a RAM 13, a current location detection device 14, an image memory 15, a display monitor 16, an input device 17, and a disk drive 18. The disc drive 18 is loaded with a DVD-ROM 19 in which map data is recorded.

  The control circuit 11 includes a microprocessor and its peripheral circuits, and performs various processes and controls by executing a control program stored in the ROM 12 using the RAM 13 as a work area. Based on the map data recorded on the DVD-ROM 19, the control circuit 11 performs various processes such as displaying a map, setting a destination, and searching for a recommended route to the set destination.

  The current location detection device 14 is a device that detects the current location of the host vehicle, that is, the location of the host vehicle. For example, a vibration gyro sensor 14a that detects the traveling direction of the host vehicle, a vehicle speed sensor 14b that detects the vehicle speed, and a GPS signal from a GPS satellite. It consists of various sensors, such as a GPS sensor 14c for detecting. The navigation device 1 can determine a route search start point, which will be described later, based on the vehicle position detected by the current location detection device 14, or can display a vehicle position mark on a map.

  The image memory 15 temporarily stores image data to be displayed on the display monitor 16. The image data includes map drawing data for displaying a map, various graphic data, and the like, and is created by the control circuit 11 based on the map data recorded on the DVD-ROM 19. The generated image data is output from the control circuit 11 to the image memory 15, whereby various map screens as described later are displayed on the display monitor 16.

  A touch panel 16a is combined with the display monitor 16, and when any position on the display monitor 16 is touched by a user's finger or the like, information indicating the touch position is output from the touch panel 16a to the control circuit 11. . Based on the touch position information, the control circuit 11 determines which part of the image displayed on the display monitor 16 is touched at that time. The navigation device 1 can execute various processes by detecting the touch panel operation from the user by the touch panel 16a and determining the content of the touch panel operation by the control circuit 11 in this way.

  The input device 17 has various input switches for the user to set the destination and waypoint of the vehicle, and is realized by an operation panel, a remote controller, or the like. The user operates the input device 17 to input an address, a telephone number, a facility name, specify a specific point on the map, or select one of registered locations registered in advance. , You can set the destination.

  The disk drive 18 reads map data for displaying a map from the loaded DVD-ROM 19. This map data includes route calculation data, route guidance data, road data, and background data. The route calculation data is used for route search to the destination. The route guidance data is used to guide the host vehicle to a destination according to a set route, and represents an intersection name, a road name, and the like. The road data represents the shape of the road. The background data represents map shapes other than roads such as rivers, railways, various facilities on the map (landmarks), and the like.

  In the road data, the minimum unit representing a road section is called a link, and each road is composed of a plurality of links. A point connecting the links is called a node, and each node has position information (coordinate information). The link shape, that is, the shape of the road is determined based on the position information of the node.

  Although an example using a DVD-ROM is described here, the map data may be read from a recording medium other than the DVD-ROM, such as a CD-ROM, a hard disk, or a memory card. Or it is good also as receiving the map data transmitted via a mobile telephone line etc. from the outside, and using the map data. That is, any method may be used for acquiring map data.

  When the destination is set by the user, the navigation device 1 uses the current location detected by the current location detection device 14 as a route search start point and performs a predetermined algorithm operation based on the above-described route calculation data, thereby obtaining the current location. Route search from to the destination. By this route search, a recommended route for the vehicle to travel is obtained. In the normal map display mode described above, the recommended route thus obtained is displayed on the map separately from other roads by changing its display form, for example, display color. In the other focus map display mode, a map is displayed with a portion other than the periphery of the recommended route being covered. Thus, the user can recognize the recommended route on the map displayed on the display monitor 16.

  When the recommended route is searched and displayed on the map as described above, the navigation device 1 instructs the user in the direction of travel using an image, sound, or the like so that the host vehicle can travel according to the recommended route. . As a result, the host vehicle is guided to the destination. Thus, route guidance to the destination is performed by displaying the map and guiding the vehicle to the destination according to the recommended route.

  Next, the map displayed on the navigation device 1 will be specifically described. As described above, the navigation device 1 allows the user to select either the normal map display mode or the focus map display mode. The selection of these map display modes is performed when the user inputs a predetermined operation to the navigation device 1 using the touch panel 16a or the input device 17.

  When the normal map display mode is selected, a map screen as shown in FIG. 2 is displayed on the display monitor 16. On this map screen, a map is displayed in the entire display area of the display monitor 16. In addition, the own vehicle position mark shown with the code | symbol 20 represents the position of the own vehicle. In this way, in the normal map display mode, the map is displayed without being obscured.

  On the other hand, when the focus map display mode is selected, a map screen as shown in FIG. 3 is displayed on the display monitor 16. On this map screen, the map appears bright and clear in the vicinity of the vehicle position mark 20, but when the vehicle moves away from the vehicle position mark 20, the map is gradually covered with a black mask and is not visible. In addition, the mask here is displayed by being superimposed on the map so as to cover an unnecessary part of the map. Thereby, on the map screen of FIG. 3, a visual effect is produced in which the map is highlighted and focused on a predetermined range centered on the host vehicle that is not masked.

  In the focus map display mode, the map screen as described above is displayed on the display monitor 16. In the following description, a map range that is brightly highlighted without being masked in the focus map display mode is referred to as an emphasized range. A map range excluding the emphasis range, that is, a map range displayed as a mask is referred to as a mask range.

  FIG. 3 shows an example of a map screen displayed in the focus map display mode when the recommended route is not set. When a destination is set and a recommended route to the destination is set, a map screen different from that in FIG. 3 is displayed. The specific contents of the map screen in that case will be described in detail later.

  In the map screen of FIG. 3, various facility icons having different forms for each type of store are displayed on the map corresponding to the location of the convenience store. As shown in the map screen of FIG. 3, the facility icon is displayed in the same display form in both the emphasis range and the mask range regardless of the presence or absence of the mask. The facility type for displaying the facility icon is not limited to the convenience store, and can be arbitrarily specified by the user. That is, the user can specify to display facility icons for various types of facilities, such as restaurants and gas stations, in addition to convenience stores. In this way, for the facility type designated by the user, the facility icons having the same display form in the highlight range and the mask range are displayed on the map. Thereby, the map information required by the user is displayed on the map so as to stand out even in the mask range.

  In the map screen displayed in the focus map display mode, the size of the emphasis range that is not displayed as a mask can be changed according to the user's operation. This will be described with reference to the map screen examples of FIGS. FIG. 4 shows an example of a map screen when the emphasis range is reduced. In this map screen, the slider 21 displayed at the bottom of the screen is located near the left end of the movable range. At this time, the position of the slider 21 can be moved according to the touch panel operation of the user.

  When the user moves the slider 21 to the right in the map screen of FIG. 4, the highlight range becomes a medium size, and the map screen as shown in FIG. 5 is displayed on the display monitor 16. When the slider 21 is further moved rightward to increase the highlight range, a map screen as shown in FIG. 6 is displayed on the display monitor 16. Thus, it can be seen that as the user moves the slider 21 to the right, the emphasis range increases accordingly, and as the user moves the slider 21 to the left, the emphasis range decreases accordingly. . Thus, by changing the size of the emphasis range according to the user's operation, the user can freely change the size of the emphasis range so that it is easy for the user to see.

  3 to 6 described above are examples of the map screen displayed in the focus map display mode when no recommended route is set. Next, the map screen displayed in the focus map display mode when the recommended route is set will be described.

  If the focus map display mode is selected when the recommended route is set, a map screen as shown in FIG. 7 is displayed on the display monitor 16. A line indicated by reference numeral 22 highlighted on the map screen represents a recommended route set between the departure point and the destination by the route search as described above. In this way, when the recommended route to the destination is set, the recommended route portion is set as the emphasis range, not around the host vehicle.

  Note that the map screen of FIG. 7 shows an example in which the recommended route portion is highlighted, but not only the recommended route portion but also a predetermined range including the recommended route can be set as the emphasized range. Further, at this time, the size of the emphasis range may be changed according to the user's operation by the same method as described in FIGS.

  In the map screen of FIG. 7, not only the recommended route portion but also the area around the guidance intersection in the recommended route is set, and the map of the range is highlighted. In addition, the guidance intersection here is an intersection where the host vehicle should turn when the host vehicle travels according to the recommended route. In addition, the display shows that the name of the guidance intersection, the distance to the intersection, the direction of turning, and the like are pointing to the intersection. In this way, map information that is easy for the user to understand when the vehicle travels along the recommended route by setting the area around the recommended route and the guidance intersection as the emphasis range and setting the other parts as the mask range and displaying the mask. Is provided.

  Even if the recommended route to the destination is set, if the guidance intersection is not within the map screen range, only the recommended route portion is highlighted as shown in FIG. The map screen is displayed. In the map screen of FIG. 8, a music playback panel as indicated by reference numeral 23 is displayed on the left side of the map. This music playback panel displays a CD jacket image of the music being played. Note that whether or not the music playback panel is displayed can be switched according to a user operation. The music playback panel is an example, and it is possible to change items to be displayed according to other user preferences.

  Next, FIG. 9 shows an example when the focus map display mode is selected on the three-dimensional map screen. In this map screen, the map is masked as a whole, and a three-dimensional map that is toned down more than usual is displayed. Further, on this map screen, information on the direction guide signboard in the traveling direction of the host vehicle and the traveling direction of each lane is displayed as indicated by reference numeral 24. The direction guidance signboard is a guide plate for informing the driver of the vehicle of the destination in each traveling direction at the intersection, and is installed near the intersection such as above the road ahead of the intersection.

  On the map screen of FIG. 9, additional information related to tourist facilities and the like may be displayed together for the area shown on the direction guide signboard so as to assist the user in determining the traveling direction. In the map screen of FIG. 9, an example in which a photograph of “Odawara Castle”, a typical tourist facility, is displayed as additional information about “Odawara” in the area represented by the direction signboard as indicated by reference numeral 25. Show. In addition to photographs of such tourist facilities, various additional information such as introduction of recommended shops and specialty dishes in the area can be provided.

  By the way, in the focus map display mode described above, the display form of the mask changes according to the time zone. This point will be described below.

  In the map screens of FIGS. 3 to 9 described above, examples of map screens displayed in the night time zone are shown. On the other hand, map screens as shown in FIGS. 10 and 11 are displayed in the daytime hours. The map screen of FIG. 10 shows an example of the map screen displayed in the focus map display mode when the recommended route is not set. In this map screen, the map is covered with a mask having a brighter color overall as compared with the map screen of FIG. Moreover, the map screen of FIG. 11 shows an example of the map screen displayed in the focus map display mode when the recommended route is set. Similarly, the map screen is covered with a mask having a brighter color overall as compared with the map screen of FIG.

  As described above, by changing the display form of the mask according to the time zone, it is possible to display a map screen that simulates the actual ambient brightness viewed from the vehicle. As a result, the map screen can be more easily viewed by the user. In the above description, an example in which the display form of the mask is changed into two types during the daytime and at night has been described. However, the display form may be changed more finely. For example, you may make it use the mask of four types of different display forms separately in the morning, the daytime, the evening, and the night time zone. Alternatively, a mask color prepared in advance may be set according to the user's preference regardless of time.

  Or it is good also as displaying a mask only in the predetermined specific time slot | zone. For example, in the daytime time zone, a normal map screen as shown in FIG. 2 is displayed without mask display. However, by selecting the focus map display mode automatically at night, a mask display is performed in a portion other than the emphasis range, and a map screen as shown in FIG. 3 is displayed. Even in this way, it is possible to display a map screen simulating the actual ambient brightness as seen from the vehicle.

  12 and 13 show flowcharts executed in the control circuit 11 when displaying the map screen as described above. In step S10 of FIG. 12, a map screen is displayed. As a result, a normal map that is not masked as shown in FIG. 2 is displayed on the display monitor 16. In the next step S20, a facility icon is displayed for the facility type designated by the user on the map screen displayed in step S10. As described above, the facility icon is displayed on the map in the same display form regardless of the presence or absence of the mask.

  In step S30, it is determined whether or not the focus map display mode has been selected by a user operation. Until the focus map display mode is selected, the process stays at step S30 and continues to display the normal map screen. When the focus map display mode is selected, the process proceeds to the next step S40.

  In step S40, it is determined whether the current time zone is daytime or nighttime. If it is daytime, the process proceeds to step S50, and a daytime mask color is selected in step S50. On the other hand, if it is night, the process proceeds to step S60, and a mask color for night is selected in step S60. The mask is displayed in steps S80 and S170, which will be described later, using either the daytime or nighttime mask color selected here. If step S50 or S60 is performed, it will progress to step S70.

  In step S70, it is determined whether or not the currently displayed map is a three-dimensional map. If it is a three-dimensional map, the process proceeds to step S80, and if it is not a three-dimensional map, the process proceeds to step S120 in FIG. Hereinafter, the case where the process proceeds to step S80 will be described first.

  When the process proceeds to step S80, a mask that covers the entire map is displayed on the display monitor 16 for the three-dimensional map being displayed. At this time, the mask color for daytime or nighttime selected in either step S50 or S60 is used. In the next step S90, the direction guide signboard, the lane traveling direction and the additional information in the traveling direction of the host vehicle are displayed. Thereby, a map screen as shown in FIG. 9 is displayed.

  In step S100, it is determined whether or not music is being reproduced. If the music is being reproduced, the process proceeds to step S110, where a music reproduction panel as indicated by reference numeral 23 in FIG. 8 is displayed. This music playback panel is displayed on the left side of the map on the three-dimensional map screen as shown in FIG. At this time, whether or not to display the music playback panel may be switched according to a user operation. If step S110 is performed, it will return to step S40. On the other hand, if it is determined in step S100 that music is not being played back, the process returns to step S40 without executing step S110.

  Next, the case where the process proceeds from step S70 to step S120 in FIG. 13 will be described. In step S120, it is determined whether a recommended route is set. When the recommended route is set up to the destination, the process proceeds to step S130, and when the recommended route is not set, the process proceeds to step S160.

  When the process proceeds from step S120 to step S130, an emphasis range is set around the set recommended route in step S130. In the next step S140, it is determined whether or not there is a guided intersection in the range of the currently displayed map. When there is a guidance intersection within the map range, the process proceeds to step S150, and in step S150, an emphasis range is set around the guidance intersection. If step S150 is performed, it will progress to step S170. On the other hand, if there is no guided intersection within the map range, the process proceeds to step S170 without executing step S150.

  Further, when the process proceeds from step S120 to step S160, in step S160, an emphasis range is set in the range of the vehicle position. If step S160 is performed, it will progress to step S170.

  In step S170, a mask for obscuring the displayed map is displayed on the display monitor 16 except for the emphasis range set in step S130, S150, or S160. At this time, the mask color for daytime or nighttime selected in either step S50 or S60 is used. Thereby, when the emphasis range is set in the range of the vehicle position in step S160, the map screen as shown in FIG. 3 is displayed at night, and the map screen as shown in FIG. 10 is displayed at daytime. The Further, when the emphasis range is set around the recommended route and the guidance intersection in steps S130 and S150, a map screen as shown in FIG. 7 is displayed at night, and a map screen as shown in FIG. 11 is displayed at daytime. Is displayed. If the emphasis range is set only around the recommended route in step S130, a map screen as shown in FIG. 8 is displayed at night.

  In step S180, it is determined whether or not to change the size of the emphasis range. When the user instructs the navigation apparatus 1 to change the size of the emphasis range by performing a predetermined operation, the process proceeds to step S190. On the other hand, when it determines with not changing the magnitude | size of an emphasis range in step S180, it progresses to step S230, without performing the process of step S190-S220.

  In step S190, the slider 21 as shown in FIG. 4 is displayed on the display monitor 16 at the bottom of the screen. As described above, the slider 21 is moved left and right in accordance with the user's operation. In the next step S200, the position of the slider 21 displayed in step S190 is detected. In the next step S210, the size of the emphasis range set in step S130, S150 or S160 is changed according to the slider position detected in step S200. At this time, as described with reference to FIGS. 4 to 6, the emphasis range is increased as the position of the slider 21 is on the right side. Thereby, the size of the emphasis range is changed according to the user's operation.

  In step S220, it is determined whether or not to change the size of the emphasis range. When the user instructs the navigation device 1 to end the change of the size of the emphasis range by performing a predetermined operation, the process proceeds to step S230. On the other hand, if the user has not made such an instruction and the user continues to change the size of the emphasis range, the process returns to step S190 to repeat the above process.

  In step S230, it is determined whether or not music is being played back. If the music is being reproduced, the process proceeds to step S240. In step S240, a music reproduction panel as indicated by reference numeral 23 in FIG. 8 is displayed on the left side of the map. At this time, whether or not to display the music playback panel may be switched according to a user operation. If step S240 is performed, it will return to step S40 of FIG. On the other hand, if it is determined in step S230 that music is not being played back, the process returns to step S40 without executing step S240.

  By executing the processing as described above, various map screens as shown in FIGS. 2 to 11 are displayed on the display monitor 16.

According to the embodiment described above, the following operational effects are obtained.
(1) A map is displayed on the display monitor 16 (step S10), and an emphasis range is set around the recommended route on which the vehicle should travel (step S130). Except for the emphasis range set in this way, a mask for covering the map is displayed on the display monitor 16 (step S170). Since it did in this way, a map can be displayed, covering an unnecessary part so that it may be easy to use also in vehicles which are traveling according to a recommended route.

(2) Furthermore, since the emphasis range is also set around the guidance intersection on the recommended route (step S150), it is possible to provide a map that is easier for the user to understand when the vehicle travels according to the recommended route. it can.

(3) When changing the size of the emphasis range, the slider 21 that can be moved according to the user's operation is displayed on the screen (step S190), and the position of the slider 21 is detected (step S200). The size of the emphasis range is changed according to the user's operation by changing the size of the emphasis range according to the position of the slider 21 thus detected (step S210). Since it did in this way, the user can change the magnitude | size of an emphasis range freely so that it may be easy to see for oneself.

(4) Regardless of the presence or absence of the mask, the facility icon for the facility type designated by the user is displayed in the same display form on the map (step S20). Since it did in this way, about the map information which a user requires, it can be displayed on a map so that it may stand out also in the range displayed by a mask.

(5) It is determined whether it is daytime or nighttime (step S40), and the mask color for daytime or nighttime is selected according to the determination result (steps S50, S60). Thus, when displaying a mask in step S80 or S170, the display form of the mask is changed according to the time zone. Since it did in this way, the map screen which simulated the actual surrounding brightness seen from the vehicle can be displayed. As a result, the map screen can be more easily viewed by the user.

(6) Or it is good also as displaying a mask in the predetermined specific time slot | zone. Even in this case, a map screen simulating the actual ambient brightness seen from the vehicle can be displayed, so that the map screen can be more easily seen by the user.

  The map display method as described above can be applied to various in-vehicle devices that display a map in addition to the vehicle navigation device. That is, the present invention can be applied to various vehicle-mounted map display devices that display a map while covering an unnecessary portion.

  The embodiment and various modifications described above are merely examples, and the present invention is not limited to these contents as long as the features of the invention are not impaired.

  In the above embodiment, each means described in the claims is realized by the processing of the control circuit 11. Specifically, the map display means is realized by step S10, the emphasis range setting means is step S130 or S150, the masking means is step S170, the emphasis range changing means is step S210, and the facility icon display means is realized by step S20. However, this is merely an example, and when interpreting the invention, there is no limitation or restriction on the correspondence between the items described in the above embodiments and the items described in the claims.

It is a block diagram which shows the structure of the navigation apparatus by one Embodiment of this invention. It is an example of a normal map screen. It is an example of the map screen which masked the unnecessary part when the recommended route is not set. It is an example when the emphasis range is made small in the map screen which masked the unnecessary part. This is an example when the emphasis range is set to a medium size on a map screen in which unnecessary portions are masked. It is an example when the emphasis range is enlarged on the map screen where unnecessary portions are masked. It is an example of the map screen which masked the unnecessary part when the recommended route is set. It is an example of the map screen which masked the unnecessary part when the guidance intersection is not in the range of a map screen. It is an example of the map screen which masked the unnecessary part in the map screen displayed in three dimensions. It is an example of the map screen which masked the unnecessary part when the recommended route is not set in the daytime time zone. It is an example of a map screen in which unnecessary portions are masked when a recommended route is set in a daytime time zone. It is a flowchart when displaying a map screen. It is a flowchart when displaying a map screen similarly to FIG.

Explanation of symbols

1 Navigation device 11 Control circuit 12 ROM
13 RAM
14 Current location detection device 15 Image memory 16 Display monitor 17 Input device 18 Disk drive 19 DVD-ROM

Claims (6)

Map display means for displaying the map on a display monitor;
An emphasis range setting means for setting an emphasis range around a recommended route on which the vehicle should travel in the map;
A vehicle-mounted map display device comprising: masking means for displaying a mask for covering the map on the display monitor, excluding the emphasis range set by the emphasis range setting means. The in-vehicle map display device according to claim 1,
The in-vehicle map display device, wherein the emphasis range setting means further sets an emphasis range around a guidance intersection where the vehicle should bend on the recommended route. The on-vehicle map display device according to claim 1 or 2,
An in-vehicle map display device further comprising an emphasis range changing means for changing the size of the emphasis range according to a user operation. The in-vehicle map display device according to any one of claims 1 to 3,
A vehicle-mounted map display device, further comprising facility icon display means for displaying a facility icon for a facility type designated by a user in the same display form regardless of the presence or absence of the mask. In the in-vehicle map display device according to any one of claims 1 to 4,
The on-vehicle map display device, wherein the masking means changes a display form of the mask according to a time zone. In the in-vehicle map display device according to any one of claims 1 to 4,
The on-vehicle map display device, wherein the masking means displays the mask only in a predetermined time zone.

Images