JP3938825B2 - Navigation device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a navigation device mounted on a vehicle or the like, and more particularly, to a navigation device that can change various display forms of a map of an image display device that displays various types of information such as a map.
[0002]
[Prior art]
In a navigation device, a map data storage device such as a DVD-ROM that records a large amount of map data, a display device, a vehicle movement detection device that detects the current position and current direction of a vehicle by a GPS, a gyro, a vehicle speed sensor, etc. And reading map data corresponding to the current position of the vehicle or a display instruction from the map data storage device, drawing a map image on the display screen based on the map data, and a vehicle position mark (location cursor) such as an arrow Is superimposed on the display screen and the map image is scrolled as the vehicle moves, or the map image is fixed on the screen and the vehicle position mark is scrolled to show where the vehicle is currently traveling. Can be seen at a glance.
[0003]
Conventionally, in-vehicle navigation devices are equipped with a route guidance function that allows a user to easily travel on a road toward a desired destination without making a mistake. This route guidance function uses map data to automatically search for the lowest cost route connecting from the starting point to the destination by performing a simulation calculation such as the horizontal search method or Dijkstra method, and the searched route is the guide route. When driving, the guidance route is drawn on the map image with a different color from other roads and displayed on the screen, or the vehicle is within a certain distance at the intersection where the route on the guidance route should be changed. When approaching, the user is guided to the destination by enlarging and displaying the intersection where the route should be changed and drawing an arrow indicating the direction in which the route should be changed and displaying it on the screen.
[0004]
In the navigation device, as described above, the map in the vicinity of the vehicle position is drawn on the display screen, the guidance route is superimposed on the map, and the map image is scrolled as the vehicle located at the center of the screen moves. However, the vehicle's position and surrounding conditions can always be checked while driving, but with the recent development of liquid crystal displays, the screen has become larger and wider. Is used to divide the screen into left and right parts, display various information in various modes on both screens, and provide a highly convenient navigation device. In the navigation device, the map is the most important display element among various information displays, and various studies have been conducted on how to display the map on the two divided screens as described above. Has been made.
[0005]
As a method of dividing the wide screen into two and displaying the map in an easy-to-see manner, for example, a map centered on the vehicle position is usually displayed on the entire screen, and when it is near the planned intersection on the left or right turn, A small map centering on the vehicle position is displayed, and an enlarged view of the intersection and various information related to the intersection are displayed on the other screen. By such a display method, in the case of the conventional display of only one screen, the surrounding map is not known at the time of intersection guidance, and it is prevented from being troubled by driving. In addition, the map is usually displayed on a single screen, and when searching for nearby facility information during this display, the screen is divided into two parts, the operation screen and the search display screen are displayed on one side, and the other side is displayed. Continued to display a small map.
[0006]
Also, according to the user's selection switching operation, the screen on one side displays a planar map with the vehicle traveling direction centered on the vehicle position, and the screen on the other side displays a map display such as a bird's eye view method and a 3D display. There are also things to do. Furthermore, by displaying a wide-area map on one screen, it is easy to see where the vehicle position is on the entire map, while the other screen shows the vicinity of the vehicle position. By displaying a detailed map, roads, facilities, and the like in the vicinity of the vehicle position are also displayed in an easy-to-understand manner. At that time, a map display that is easier to understand is also performed by appropriately adopting a bird's-eye view method, a 3D display method, etc. for each wide-area map screen or detailed map screen.
[0007]
[Problems to be solved by the invention]
As described above, in response to the widening of the display in the vehicle-mounted navigation device, it is made into two screens by the user's selection switching operation as necessary, and various modes of maps are displayed on each screen. As one mode, the map display on one screen and the map display on the two screens are switched by the user's selection switching operation. In the case of the map display on the two screens, a wide-area map is displayed on one screen. A detailed map is also displayed on the side screen.
[0008]
In such a screen display form, for example, assuming that the user has entered a narrow road in the city from a state where a wide-area map of one screen is displayed by running on a national road for a long time, Since the map display of the narrow street is omitted in the display state of the wide area map, it is preferable to switch to the detailed map in which the narrow street is also displayed when entering the narrow street in the city. In such a case, in the conventional apparatus, it is necessary for the user to perform a map display switching operation from a wide area map screen to a detailed map screen that can also display a narrow street. In addition, as a two-screen display mode, when a wide-area map is displayed on one screen and a detailed map is displayed on the other screen, a wide-area / detailed map parallel display mode is further selected and operated. There is a need.
[0009]
On the other hand, when driving on narrow streets, when a wide road such as a national road is entered from a state where a wide area and detailed map are displayed in parallel on a two-screen display, it is necessary to display a detailed map when traveling on this road for a while. In some cases, a one-screen wide area map display is preferred. In such a case, the user needs to switch from the two-screen display state to the single-screen display, and perform a selection switching operation for the screen to the wide-area map display.
[0010]
For example, when driving along a guidance route, when the destination is far enough, or when driving on a relatively wide road that is far enough to the left or right planned intersection, It is preferable to display mainly a wide area map in such a traveling state. On the other hand, when the vehicle is close to the destination or close to the right or left turn intersection, or when driving on a narrow street, the vehicle traveling speed is often slow. It is preferable to display a map. In selecting the screen display in each driving state as described above, in the conventional device, it is necessary for the user to always perform the selection switching operation by determining whether the wide area map display or the detailed map display is necessary. It was troublesome.
[0011]
On the other hand, in the conventional two-screen split display, when the wide area map and the detailed map are displayed on both screens, the ratio of the left and right screens is usually the same, and the sizes of the left and right screens are equal. Since such a division method is adopted, both maps are displayed with equal weighting. Therefore, if you want to display a detailed map in the vicinity while displaying a wide area map mainly on a small screen, or conversely, you want to display a wide area map on a small screen while displaying a detailed map mainly. In some cases, the above display format cannot meet the demand.
[0012]
In order to cope with this, it has been proposed that, in the two-screen split display, the screen on one side is enlarged, the screen on the other side is reduced by that amount, and a different map is displayed for each. However, even in this case, the mode of the map displayed on each screen does not change unless the user performs a display change operation. For this reason, the display of the map screen according to the conventional two-screen division method is not necessarily displayed in a mode according to the user's intention, and the user needs to frequently change the display according to the driving state of the vehicle. . Therefore, such manual switching operation is troublesome, and it is not preferable from the aspect of safe driving that the driver performs these operations.
[0013]
Therefore, the present invention automatically switches the two-screen display to the one-screen display according to the traveling state of the vehicle, for example, whether the vehicle has entered a narrow street or whether the traveling speed has become lower than a predetermined speed. Or, the ratio of the size of each screen in multiple screen split display can be changed, so there is no need to manually change the screen display, and the change operation does not hinder driving The main purpose is to provide a navigation device.
[0014]
[Means for Solving the Problems]
In order to solve the above problems, the present invention according to claim 1 Whether the vehicle is traveling on a narrow street or whether the vehicle speed is below a predetermined value In accordance with a signal from the vehicle running state detecting unit, a display screen setting unit for setting the number of display screens or a screen ratio of a plurality of screens according to a signal from the vehicle running state detecting unit, and a signal from the display screen setting unit A map screen forming unit for forming a map screen to be displayed on the image display device, and the display screen setting unit sets the number of map screens to be displayed on the image display device or the screen ratio of the plurality of screens according to the running state. The navigation device is characterized by the above.
[0015]
The invention according to claim 2 When the vehicle running state detecting unit detects that the vehicle is running on a narrow street, the display screen setting unit is The navigation device according to claim 1, wherein the navigation device is set to a one-screen display of a map including a narrow street or a screen display that displays a map including a narrow street at a screen ratio larger than that of other maps.
[0016]
The invention according to claim 3 When the vehicle running state detection unit detects that the vehicle speed is a predetermined value or less, the display screen setting unit is The navigation device according to claim 1, wherein the navigation device is set to a one-screen display of a detailed map or a screen display that displays the detailed map at a screen ratio larger than that of the wide area map.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a functional block diagram of a navigation control apparatus 100 embodying the present invention, in which a signal from a satellite received by an antenna 101 is processed by a GPS receiver 102, and vehicle position data based on the signal from the satellite is stored in a data storage unit. 103. On the other hand, a signal from a self-contained navigation sensor 106 consisting of an angle sensor 104 and a distance sensor 105 provided on the vehicle is input to the vehicle position / orientation calculation unit 107, and position data from the self-contained navigation sensor is obtained. obtain.
[0018]
The vehicle position signal generation unit 108 corrects the own vehicle position data by GPS in the data storage unit 103 with the position data in the vehicle position / orientation detection unit 107 to obtain accurate vehicle position data. The vehicle position signal obtained by the vehicle position signal generation unit 108 is output to various functional units in the navigation control apparatus 100 described later via the vehicle position data line 109 and used in each unit.
[0019]
User operation signals from the remote control 110 attached to the navigation device, the touch panel 111 provided on the display, and various operation switches 112 are input to the operation signal input unit 113. The signal is output to various functional units in the navigation control apparatus 100 via the operation signal data line 114 and used as a user instruction signal.
[0020]
Based on the vehicle position data and the operation signal, the ROM read control unit 115 stores a map storage medium (hereinafter abbreviated as “DVD-ROM”) 116 such as a DVD-ROM or CD-ROM storing a large amount of map data. A predetermined map is read out and stored in the map buffer 117. This map data is output to various functional units in the navigation control apparatus 100 via the map data line 118 and used for various purposes to be described later. Note that the vehicle position data line 109, the operation signal data line 114, and the map data line 118 are shown in the description of FIG. 1 for clarifying the input / output of data, and in the actual control device. Is performed by signal transmission on the common bus line.
[0021]
The vehicle speed sensor 120 and various sensors 121 that can detect the running state of the vehicle as required, such as a snake angle sensor, a transmission operation sensor, and a brake operation sensor, are input to the vehicle running state detection unit 122. The vehicle running state signal is output to the map selection control unit 136 and the display screen number / screen ratio switching unit 144, and is used as a reference signal for automatically controlling the display of an image as described in detail later. In addition, the navigation control apparatus 100 includes a VICS receiver 125 that receives FM multiplex broadcasting or the like, and the received signal is temporarily stored in the VICS information buffer 126 and updated as appropriate.
[0022]
Although the navigation device can perform various functions by inputting such various data, the navigation control device 100 in FIG. 1 mainly shows an image processing function part to the image display device 130, for example, a voice. The functional unit for the recognition device is omitted. The guidance route calculation unit 131 receives the current position data from the vehicle position signal generation unit 108, receives a search instruction from the operation signal input unit 113 for designation of a destination, waypoint, highway priority, etc. The traffic jam information from the buffer 126 is input, and various cost calculations are performed to calculate the optimum guidance route. The result is stored in the guide route memory 132, and the guide route drawing unit 133 can display the guide route in various forms. Part of the information in the VICS information buffer 126 is converted into image data by the VICS information display unit 134.
[0023]
In the intersection guidance display unit 135, based on the vehicle position from the vehicle position signal generation unit 108, the map information from the map buffer 117, and the guidance route information from the guidance route memory 132, the current vehicle position is displayed on the right side of the guidance route. It is determined whether or not a left turn intersection has been reached. When the vicinity is reached, an intersection guide map is created.
[0024]
A narrow street travel detection unit 128 provided in the vehicle travel state detection unit 123 for detecting various travel states of the vehicle takes in a vehicle position signal and map data, and the position of the currently traveling vehicle is on the narrow street. It is determined whether or not. In the map selection control unit 136, a discrimination signal from the narrow street travel detection unit 128, a vehicle speed signal from the vehicle travel state detection unit 122, and the like are input, and the vehicle position from the vehicle position signal generation unit 108 and the map buffer 117 are input. In response to the map data from and the screen display instruction signal from the operation signal input unit 113, a predetermined scale of the various map data in the map buffer 117 is sent to the first map memory 137 and the second map memory 138. The map data is instructed and loaded and stored.
[0025]
The display method designation unit 142 uses the vehicle position as a reference to display a signal for displaying a map of a designated display method such as a bird's-eye view or 3D display from the operation signal input unit 113 for each of two-screen display. It transmits to the 1st map drawing part 140 and the 2nd map drawing part 141 corresponding to a screen. The first map drawing unit 140 and the second map drawing unit 141 perform calculations for displaying a map based on the current vehicle position by the instructed display method, and create and draw map image data. A map of a predetermined range is drawn by a predetermined display method at a predetermined scale.
[0026]
In the display screen number / display ratio setting unit 144, the vehicle travel state signal such as the vehicle speed signal from the vehicle travel state detection unit 122 and the narrow street travel detection unit 128 captured via the map selection control unit 136 are displayed. The display state of the map screen formed by the map screen forming unit 145 according to a signal indicating whether the vehicle is traveling on a narrow street, or various signals from the map selection control unit 136 as necessary, For example, switching between one-screen display and two-screen display is performed, such as changing the display area ratio of both screens during two-screen display.
[0027]
Note that the navigation control apparatus shown in FIG. 1 includes an information search unit 147, which maps a search instruction signal from the operation signal input unit 113 and various facility information attached to the map loaded into the map buffer 117. The retrieval is performed by retrieving from the buffer 117, and the search information display unit 148 forms image data in accordance with a display instruction from the operation signal input unit 113. In addition, there are provided various mark generators 150 for generating various marks to be displayed on the screen, an operation screen generator 151 for using the screen as a touch panel, and the like.
[0028]
In the image composition unit 152, among the various images formed as described above, in particular, the map image from the map screen formation unit 145, the guidance route from the guidance route drawing unit 133, and the vehicle position from the various mark generation units Marks and the like are appropriately combined, subjected to image processing such as necessary transparency processing and combined, and output to the image display device 130 for display.
[0029]
In the navigation device as described above, the map data stored in the DVD-ROM or the like is recorded for each hierarchy as shown in FIG. That is, map data including narrow streets is recorded at level 0 in the figure, whereas map data recording roads higher than the main municipal roads at level 1. Therefore, the narrow streets indicated by the thin lines in the hierarchy 0 in the figure are not recorded in the hierarchy 1, and only the roads indicated by the thick lines in the hierarchy 0 are recorded in the hierarchy 1 as roads higher than the main municipal roads. Similarly, since level 2 records roads above the prefectural road, not only the narrow streets of level 0 but also the main municipal roads are recorded, and more than the prefectural roads indicated by the thick lines in level 1 in the figure. Is recorded in level 2, only national roads are recorded in level 4, and map data below the prefectural roads are not recorded. Therefore, in the example shown in FIG. All are not recorded in level 4.
[0030]
With such a hierarchical structure of map data, when displaying in a two-screen split method on the image display device of the navigation device, if it is an aspect in which a detailed map is displayed on one screen and a wide-area map is displayed on the other screen, The map displayed on is a map as shown in FIG. In FIG. 3A, the entire screen A is divided into the same size of the right screen B and the left screen C, and the right screen B displays a wide area map. A map representing roads above the prefectural roads in level 2 in FIG. 2 is displayed. On the other hand, the left screen C shows a detailed map of a region Q indicated by a dashed frame around the vehicle position mark P in the right screen B, and this region shows up to the level 0 narrow street in FIG. It has become a map. Note that the hierarchy of the map displayed on the two screens can be arbitrarily set by the user as needed.
[0031]
In the present invention, during the two-screen split display as described above, for example, in the example of FIG. 3 (a), the state of traveling on National Road No. 1 indicated by K in the left screen C is shown. A wide area map is displayed on the right screen B, and a detailed map including a narrow street is displayed on the left screen C. In this state, when turning left from the national highway K and entering the narrow street indicated by S in FIG. 3, a one-screen display is shown as shown in FIG. 3B, and a map including the narrow street is displayed on the screen. Display in whole. In FIG. 3B, when the vehicle turns left as described above, the entire screen is displayed rotated 90 degrees along the traveling direction of the vehicle.
[0032]
In the present invention, the detailed map can be displayed on one screen when traveling on a narrow street, for example, by the navigation control device 100 shown in FIG. 1 according to the operation flow shown in FIG. First, the current vehicle position and road data are taken in as basic data for image display (step S1). In the navigation control apparatus 100 shown in FIG. 1, this capture is performed by capturing the vehicle position signal from the vehicle position signal generation unit 108 and the map data from the map buffer 117 in the narrow street travel detection unit 128. .
[0033]
Next, based on both data, it is determined whether or not the vehicle is traveling on a narrow street (step S2). In this determination, it is possible to determine whether the road where the vehicle is located is a road stored only in the narrow street display hierarchy of the hierarchy 0 shown in FIG. 2 in the map data. Depending on the data representing the type of road in the road, it can be determined whether the road that is currently running is a narrow street, or whether the road is less than a predetermined width from the road width data, Further, it can be determined by various means such as whether or not the road is less than a predetermined length from the road length data.
[0034]
As a result of the above determination, when it is determined that the vehicle is traveling on a narrow street, the map selection control unit 136 in the navigation control device 100 shown in FIG. The operating state of the screen ratio setting unit 144 is detected and discriminated (step S3). If a two-screen display setting signal is being output, the display instruction number / screen ratio setting unit 144 is instructed to switch to one screen. Is output. In addition, the map selection control unit 136 instructs the second map memory 138 to take in map data including a narrow street, for example, and also displays the data in the second map memory to the display screen number / screen ratio setting unit 144. An instruction is output so as to select the map data of the second map drawing unit that handles.
[0035]
The second map drawing unit 141 performs a display calculation based on the map data in the second map memory and according to the display method designation such as the standard display method or the bird's eye view display method from the display method designating unit 142, for map drawing. The map screen forming unit 145 captures this data, and in response to a one-screen display instruction from the display screen number / screen ratio setting unit 144 and a data selection instruction from the second map drawing unit, the second map drawing unit A map screen is formed so that the image data of 141 is displayed on one screen, and is output to the image composition unit 152. As a result, the image display device 130 displays a detailed map including a narrow street as shown in FIG. 3B on the entire screen (step S5). If it is determined in step S3 that one screen is currently displayed, the detailed map including the narrow streets is displayed in the same manner as described above.
[0036]
On the other hand, when it is determined in step S2 that the vehicle is not traveling on the narrow street, various modes of map screen display can be performed by the same operation as before. For example, it is determined whether or not there is a display switching instruction (step S6). When there is no switching instruction, it is determined whether or not two screens are currently displayed (step S7). When two screens are being displayed, a wide area map is displayed on the first screen as shown in FIG. S8) A detailed map is displayed on the second screen (step S9). At this time, the scale of the wide area map and the scale of the detailed map can be set as appropriate, and when it is desired to change the scale, it can be switched by determining whether or not there is a display switching instruction in step S6. .
[0037]
If it is determined in step S7 that the two-screen display is not being performed, the current display is continued as it is (step S10). If it is determined in step S6 that a display switching instruction has been issued, the screen is switched to the instructed display (step S11). In this way, various types of map display can be performed on the image display device, and when the vehicle enters the narrow street, a detailed map can be displayed immediately on one screen. It is possible to automatically display a large detailed map on the entire screen without performing the switching instruction operation.
[0038]
On the other hand, in the present invention, for example, as shown in FIG. 5A, when displaying two screens on the image display device, the right screen and the left screen are made different in size and divided into a large screen and a small screen. When the map screen display method is adopted, for example, as shown in the figure, a wide area map is displayed with the right screen D as a large screen, the left screen E as a small screen, and the vehicle position mark P in the right screen D When the vehicle speed is lower than a predetermined speed from the state where the detailed map corresponding to the map in the range indicated by the surrounding broken line frame Q is displayed, the wide area map is displayed as shown in FIG. The right screen D can be a small screen, and the left screen E displaying a detailed map can be a large screen. That is, when the vehicle speed is less than or equal to a predetermined value, it is a time when it is desired to know the situation of the surrounding road in more detail. In this invention, a user such as a driver does not perform any operation without performing any operation. To be able to see. The scale of the detailed map displayed automatically at this time can be set to change according to the vehicle speed, or it can be set to always display a map including narrow streets when the vehicle speed is lower than the predetermined vehicle speed. You can leave it.
[0039]
The above functions can be performed by the operation flow shown in FIG. Explaining this together with the functional block diagram of the navigation control device 100 shown in FIG. 1, the vehicle running state detection unit 122 detects vehicle speed by inputting vehicle speed data from the vehicle speed sensor 120 (step S21). The vehicle speed can also be obtained from data from the distance sensor 105 in the self-contained navigation sensor 106. Based on the detected vehicle speed, it is determined whether the vehicle speed is equal to or lower than a predetermined vehicle speed, for example, 30 km / h or less (step S22). In this determination, in addition to determining whether or not the vehicle speed has become a predetermined value or less, for example, it is possible to further determine whether or not the vehicle has traveled at a low vehicle speed for a predetermined time or a predetermined distance. it can.
[0040]
As a result of the determination in the vehicle running state detection unit 122, when it is determined that the vehicle speed is equal to or lower than the predetermined vehicle speed, a ratio change signal is output to the display screen number / screen ratio setting unit 144, and the display screen number / screen ratio setting unit In 144, for example, as shown in FIG. 5 (b), the small screen left screen E which has been displaying the detailed map as shown in FIG. 5 (a) is shown in FIG. 5 (b). A large screen is displayed, and a detailed map is displayed on the entire surface of the large screen (step S23). On the contrary, the right screen D of the large screen that has been displaying the wide area map is changed to the small screen, and the detailed map is displayed within the range (step S24). As a result, a detailed map in the range of the broken line frame around the vehicle position mark P on the right screen D is displayed on the left screen E. On the other hand, when it is determined in step S22 that the vehicle speed exceeds the predetermined value, a wide area map is displayed on the large screen side as shown in FIG. 5A (step S25), and details are displayed on the small screen side. A map is displayed (step S26).
[0041]
In the above embodiment, when the detailed map is displayed on the large screen side and the wide area map is displayed on the small screen side, the small screen side is set to the large screen at the same position, and the large screen side is set to the small position at the same position. The screen is configured such that the positions of the large screen side and the small screen side are exchanged to the left and right. For example, as shown in FIG. 6, instead of the wide area map displayed on the large screen of the right screen D, The detailed map may be displayed in size, and the wide area map may be displayed in the size as it is instead of the detailed map displayed on the small screen of the left screen E. By displaying in this way, it is possible to always arrange a large screen, which is an important map screen, on the side closer to the driver.
[0042]
Furthermore, when the vehicle speed is below a predetermined value, the detailed map is displayed on the large screen side as described above, and the large and small screen ratio is displayed on the small screen side. As shown in FIG. 3 (a), it is possible to change the screen ratio of one screen into two equal parts and display a wide area map on one side and a detailed map on the other screen.
[0043]
In the above-described embodiment, when it is detected that the vehicle is traveling on a narrow street, an example in which only a detailed map including a narrow street as shown in FIG. However, for example, as shown in FIGS. 5B and 6, a detailed map including a narrow street may be a large screen, and a large and small two-screen display may be used in which a wide area map is a small screen. Similarly, in the said Example, when the vehicle speed becomes below a predetermined value, the detailed map as shown in FIG.5 (b) is shown as a large screen, and the example made into the large and small 2 screen which makes a wide area map a small screen is shown. However, for example, as shown in FIG. 3B, a one-screen display of only a detailed map may be used.
[0044]
【The invention's effect】
Since the present invention is configured as described above, the invention according to claim 1 is When it is detected whether the vehicle is traveling on a narrow street or whether the vehicle speed is below a predetermined value Switching between two-screen display and single-screen display, or automatically changing the ratio of the size of each screen in the multi-screen split display, the driver can change the screen display as in conventional devices. There is no need to do it. In addition, since it is not necessary for the driver to perform the screen display changing operation as described above, it does not hinder driving.
[0045]
In the invention according to claim 2, when the vehicle is traveling on a narrow street, a one-screen display of the map including the narrow street is automatically performed or a map including the narrow street is displayed in a large size. A map suitable for driving can be displayed easily without any operation. Moreover, since the display is automatically performed as described above, there is no trouble in driving.
[0046]
In the invention according to claim 3, when the vehicle speed is equal to or lower than the predetermined value, the detailed map can be displayed on one screen, or the detailed map can be displayed at a screen ratio larger than the wide area map. When the vehicle is fast, you can automatically display a large area map without knowing anything and know the situation in a wide area. Conversely, when the vehicle speed is slow, it automatically displays a detailed map and displays the surrounding details. Since the situation can be known, the convenience of the navigation device is improved.
[Brief description of the drawings]
FIG. 1 is a functional block diagram of a navigation device of the present invention.
FIG. 2 is an explanatory diagram showing a hierarchy of map data used in the present invention.
FIG. 3 shows an example of changing the number of screen displays in the present invention, (a) shows an example in which two screens are displayed in an equally divided manner, and (b) shows an example in which a detailed map is displayed on one screen. Show.
FIG. 4 is an operation flow chart when changing the screen display when traveling on a narrow street in the present invention.
FIG. 5 shows an example of changing the screen ratio in the present invention, (a) shows an example in which a wide area map is displayed on the large screen, and (b) shows an example in which a detailed map is displayed on the large screen. ing.
6 shows an example of changing the screen ratio in the present invention, and shows an example in which a detailed map is displayed on the large screen portion of FIG. 5 (a).
FIG. 7 is an operation flowchart when changing the screen display according to the vehicle speed in the present invention.
[Explanation of symbols]
100 Navigation control device
108 Vehicle position signal generator
113 Operation signal input section
117 map buffer
120 Vehicle speed sensor
122 Vehicle running state detection unit
136 Map selection control device
144 Number of display screens / screen ratio setting section
145 Map Screen Forming Department
152 Screen composition part
130 Image display device

Claims (3)

A vehicle running state detector that detects whether the vehicle is traveling on a narrow street or whether the vehicle speed is a predetermined value or less ;
A display screen setting unit for setting the number of display screens or a screen ratio of a plurality of screens according to a signal from the vehicle running state detection unit;
A map screen forming unit for forming a map screen to be displayed on the image display device in response to a signal from the display screen setting unit,
A navigation device, wherein the display screen setting unit sets the number of map screens or the screen ratio of a plurality of screens displayed on the image display device in accordance with the running state. When the vehicle running state detection unit detects that the vehicle is traveling on a narrow street, the display screen setting unit displays a one-screen display of a map including the narrow street or a map including the narrow street from another map. The navigation device according to claim 1, wherein the navigation device is set to display a screen with a large screen ratio. When the vehicle running state detection unit detects that the vehicle speed is less than or equal to a predetermined value, the display screen setting unit displays a single screen of a detailed map or a screen display that displays the detailed map at a screen ratio larger than the wide area map. The navigation device according to claim 1, wherein

Images