JP4045515B2 - Navigation device and map scroll speed control method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an automobile navigation device that displays map information on a display device.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, navigation devices of this type are known that have a function of scrolling a display on a display device in a direction approaching a destination along a recommended route selected by a user operation.
That is, in this navigation device, first, based on the departure place, waypoint, destination, and search conditions input by the user's operation, the recommended route is determined with reference to a pre-registered database.
[0003]
Then, the map information representing the determined recommended route is displayed on the display device at a predetermined scale, and further, the display of this map information is scrolled along the recommended route along the road, so that the destination can be changed from the current location to the destination. The entire route of the recommended route is disclosed to the user by following the route up to.
[0004]
[Problems to be solved by the invention]
However, in the above prior art, scrolling is performed at a constant scroll speed regardless of the distance between the current location and the destination.
For this reason, when the distance between the current location and the destination is long, there is a problem that it takes a long time to finally display the destination.
[0005]
Accordingly, an object of the present invention is to provide a navigation device that can perform optimal scrolling according to the distance of a destination and road attributes when scrolling a display along a recommended route.
[0006]
[Means for Solving the Problems]
In order to solve such a problem, in the present invention, a display means for displaying map information, a positioning means for positioning the current position of the vehicle, and a travel route from the starting point of the vehicle to the destination are searched based on a user operation. And a scroll for scrolling the display of the map information on the display unit in the direction approaching the destination along a plurality of reference movement points of the travel route searched by the route search unit based on the user's operation Display control means, and the scroll display control means determines the scroll speed according to the remaining distance from the current position of the vehicle to the destination , obtains the scroll movement distance based on the scroll speed, and scrolls from the current position. The next reference movement point corresponding to the distance is obtained, and the adjacent reference movement points are divided into minute movement points according to the rewriting speed by the display means. While maintaining the speed and synchronization so as to scroll the display of the map information in minute movement point units. Thus, when the user confirms the travel route from the departure point to the destination, from the current position of the vehicle and determines the scrolling speed in accordance with the Zan距away to the destination, to the destination from the current position of the vehicle since between reference moving point can be further scroll control in a fine small moving point unit, it is possible to visually confirm the travel route to the scroll operation is smooth and efficient good rather their destinations to the user.
[0007]
In the present invention, the display step of displaying the map information on the predetermined display means, the positioning step of positioning the current position of the vehicle by the positioning means, and the travel from the departure point of the vehicle to the destination based on the user's operation A route search step for searching for a route by a predetermined route search means, and a predetermined scroll for displaying map information by a display step along a plurality of reference moving points of the travel route searched by the route search step based on a user operation A scroll display control step for scrolling in a direction toward the destination by the display control means, and in the scroll display control step, the scroll speed is determined according to the remaining distance from the current position of the vehicle to the destination , The scroll movement distance is calculated based on the scroll speed, and the scroll movement distance is determined from the current position. We obtain the following criteria moving point which is, divided into small moving point according to the rewriting speed of the display means between reference moving point adjacent scrolls by minute movement point unit displaying map information while taking rewriting speed and synchronization Like that. Thus, when the user confirms the travel route from the departure point to the destination, from the current position of the vehicle and determines the scrolling speed in accordance with the Zan距away to the destination, to the destination from the current position of the vehicle since between reference moving point can be further scroll control in a fine small moving point unit, it is possible to visually confirm the travel route to the scroll operation is smooth and efficient good rather their destinations to the user.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of a navigation device according to the present invention will be described below.
FIG. 1 is a block diagram showing a hardware configuration example of a navigation apparatus according to the present invention.
The navigation device of this example includes a main CPU 100 that controls the entire device, a DRAM 110 that stores various programs and data, a mask ROM 120, a flash ROM 130 and an SRAM 140, an FM tuner 150 for selecting an FM frequency, and various peripheral devices. Peripheral control device 160 and sub CPU 170 for controlling
[0010]
A speaker 220 is connected to the peripheral control device 160 via a D / A converter 210 to perform various sound outputs. In addition, a liquid crystal display (LCD) 230 is connected to the peripheral control device 160 to perform various displays.
Further, the peripheral control device 160 and the sub CPU 170 are connected to a CD-ROM drive 240 for driving the CD-ROM 250, and the data in the CD-ROM 250 is appropriately captured and processed.
[0011]
Further, a GPS controller 260 having a GPS antenna 270 is connected to the sub CPU 170, and the current position is detected by a GPS (global positioning system) system using a navigation satellite.
The sub CPU 170 is connected to a remote control light receiving unit 290 that receives an optical signal from the remote control device 280 using infrared rays or the like, and detects various inputs from the user. Further, the sub CPU 170 is provided with a gyro sensor 300 that inputs a vehicle speed pulse and detects a direction.
[0012]
FIG. 2 is a block diagram showing a configuration related to the function of the present invention in the navigation apparatus shown in FIG.
In this figure, the double-framed block shows a configuration realized by hardware, and the single-framed block shows a configuration realized by software. The software shown in this figure is stored in, for example, the flash ROM 130 described above, transferred to the DRAM 110, and executed by the main CPU 100.
[0013]
First, the liquid crystal display device 230 displays a map image by the display controller 310 and the display memory 320 provided in the peripheral control device 160. The data in the display memory 320 is rewritten every 1/60 seconds, and the display on the liquid crystal display device 230 is sequentially updated.
A signal from the remote control device 280 input by the remote control light receiving unit 290 is monitored by the state management device 330.
[0014]
The state management device 330 receives a trigger from the user as a key code for the system from the remote control device 280, interprets it according to the type of the trigger and the state of the system, and other software blocks such as a map block and a route search block Is a software block that has a role of issuing a trigger from the other software blocks.
The map display control device 340 is a software block that receives a trigger from the state management device 330. Examples of the trigger include scrolling the map and changing the scale.
Here, the number of scales that can be displayed, the range that can be displayed, the type of map that is currently being displayed, and the like are managed. Then, the trigger from the state management device 330 is interpreted, and the trigger is output to the map drawing control device 350 as a necessary drawing instruction.
[0015]
The map drawing control device 350 manages the currently displayed map, outputs a necessary map data acquisition request to the map information management device 360 in response to the trigger, and receives the response via the display controller 310. A map image is drawn in the display memory 320.
The map information management device 360 reads the map data requested from the map drawing control device 350 from the map data block 400. Also, map data that is no longer needed is released. Further, if necessary, the read map data is converted into a drawable format.
[0016]
The route information 370 is route information obtained as a result of searching by the route search device 380. The data format here is sufficient to uniquely determine the recommended route.
The route search device 380 satisfies the conditions when the state management device 330 triggers a search request together with information such as a departure place, a waypoint, a destination, and a search condition (whether a toll road can be selected, etc.). It is a device that searches for encouraged routes.
The map data is composed of data that can link the route network information stored in the storage device and the map image information.
[0017]
3 to 5 are flowcharts showing the control of the road scroll process in this example, and FIG. 3 shows the basic operation of the road scroll process. 4 shows a first example of the movement point and movement speed calculation process in steps S8 and S9 in FIG. 3, and FIG. 5 shows the movement point and movement speed calculation process in steps S8 and S9 in FIG. The 2nd example of is shown.
Here, the road scrolling process smoothly scrolls the map of the display device 230 along the recommended route searched by the route search device 380, and introduces the entire recommended route to the destination. It is processing to do.
[0018]
First, in steps S1 and S2 in FIG. 3, when a trigger for starting the scrolling of the road is transmitted to the map display control device 340 through the route of the remote control device 280 → the remote control light receiving unit 290 → the state management device 330, the loop of steps S3 to S7 to go into.
This loop is a loop for smoothly scrolling the map along the road. By dividing the movement of the map corresponding to the reference movement point set at intervals of several seconds into minute units of 1/60 seconds, A fine moving point is provided between the reference moving points to realize smooth scrolling.
[0019]
That is, in step S4, the map is moved to the next minute movement point after 1/60 seconds, and the next minute movement point after 1/60 seconds is obtained in step S5. In step S6, it is determined whether or not the reference movement point has been reached. If it has not reached, the process returns to step S3 after waiting for 1/60 second in step S7. The operations after step S4 are repeated.
Therefore, the scrolling speed can be variably controlled by changing the way of taking the moving speed between the reference moving point in units of several seconds divided into 1/60 second minute units and the two reference moving points. This reference moving point and moving speed are calculated in steps S8 and S9.
[0020]
That is, if the reference moving point is reached in step S6, the process proceeds to step S8 to acquire the remaining distance information to the destination and the road type information. In step S9, the following information is obtained based on the acquired information. The reference moving point and the moving speed up to that point are calculated.
Based on this calculation result, the map movement in step S4 is divided in step S5 into minute movement amounts per minute unit time of 1/60 seconds, and synchronized in step S7 with a 1/60 second timer. Execute.
[0021]
For example, if the distance to the next reference movement point is L and the movement speed is V, the required time to the next reference movement point is L / V, which is divided in units of 1/60 seconds, and the map information is scrolled. Thus, if V is increased, the scroll speed can be increased, and if V is decreased, the scroll speed can be decreased.
[0022]
FIG. 4 is a flowchart showing the operation of determining the reference moving point and the moving speed based on the road attribute information in steps S8 and S9 of FIG.
First, calculation processing is started in step S11, and a road attribute that is currently scrolling is obtained in step S12. It is assumed that the road attribute of the display center position of the recommended route being displayed is obtained. Then, the moving speed is determined from the obtained road attribute. This can be determined, for example, by creating and storing a table in which road types and movement speeds are associated with each other and referring to them.
[0023]
In step S13, the movement distance is obtained from the above-described movement speed. In step S14, a point corresponding to the movement distance is obtained from the center coordinates currently displayed, and this is used as a reference movement point. Thereby, the calculation of the reference moving point and the moving speed is completed, and the operation returns to the operation of FIG. 3 (step S15).
By such processing, for example, by increasing the scroll speed on expressways and slowing the scroll speed on narrow streets, on highways with clear routes, the scroll time can be shortened and efficiently guided, and complicated narrow streets Now let's refer to the map in detail.
[0024]
FIG. 5 is a flowchart showing an operation of determining the reference moving point and the moving speed based on the remaining distance to the destination in steps S8 and S9 of FIG.
First, calculation processing is started in step S21, and the remaining distance to the current position and the destination is obtained in step S22. Then, the moving speed is determined from the obtained remaining distance. This can be determined, for example, by creating and storing a table in which the remaining distance and the moving speed are associated with each other and referring to the table. It can also be determined by a calculation formula corresponding to the remaining distance.
[0025]
In step S23, the movement distance is obtained from the above-described movement speed. In step S24, a point corresponding to the movement distance is obtained from the center coordinates currently displayed, and this is used as a reference movement point. Thereby, the calculation of the reference moving point and the moving speed is completed, and the operation returns to the operation of FIG. 3 (step S25).
By such processing, for example, by increasing the scroll speed when the destination is far, and by decreasing the scroll speed when approaching the destination, the route to the destination can be guided efficiently. Make it possible to refer to the map in detail near the ground.
[0026]
In this example, the moving speed is determined based on the remaining distance to the destination, but in addition to the remaining distance to the destination, the passing distance from the departure place is determined. For example, in the vicinity of the destination and the vicinity of the departure place, Processing that slows down scrolling and speeds up scrolling at intermediate points is also possible.
Further, the scroll speed may be variably controlled by combining both the remaining distance to the destination and the road attribute.
[0027]
【The invention's effect】
According to the present invention as described above, when the user confirms the travel route from the departure point to the destination, and determines the scrolling speed in accordance with the Zan距away from the current position of the vehicle to the destination, scroll speed The scroll movement distance is obtained based on the current position, the next reference movement point corresponding to the scroll movement distance is obtained from the current position, the adjacent reference movement points are divided into minute movement points according to the rewriting speed by the display means, and the rewriting speed is obtained. If so synchronize can be controlled scroll the display of the map information in small moving point unit while taking, it is possible to visually confirm the travel route to the scroll operation is smooth and efficient good rather their destinations to the user, thus it is possible to realize a navigation device and the map scroll speed control method capable of performing an optimum scroll which significantly and improves the convenience of the user
[Brief description of the drawings]
FIG. 1 is a block diagram showing a hardware configuration example of a navigation apparatus according to the present invention.
2 is a block diagram showing a configuration related to the function of the present invention in the navigation device shown in FIG. 1;
FIG. 3 is a flowchart showing a path scrolling operation of the navigation device shown in FIG. 1;
4 is a flowchart showing an operation of determining a reference moving point and a moving speed based on road attribute information in the operation of FIG. 3;
5 is a flowchart showing an operation of determining a reference moving point and a moving speed based on the remaining distance to the destination in the operation of FIG.
[Explanation of symbols]
100... Main CPU 110 110 DRAM 120 Mask ROM 130 Flash ROM 140 SRAM FM 160 Peripheral controller 170 Sub CPU 210 210 D / A converter, 220 ... speaker, 230 ... liquid crystal display device, 240 ... CD-ROM drive, 250 ... CD-ROM, 260 ... GPS controller, 270 ... GPS antenna, 280 ... remote control device, 290 …… Remote control light receiving unit, 300 …… Gyro sensor.

Claims (2)

Display means for displaying map information;
Positioning means for positioning the current position of the vehicle;
Route search means for searching for a travel route from the departure point to the destination of the vehicle based on a user operation;
Scroll display control for scrolling the display of map information by the display unit in a direction approaching the destination along a plurality of reference movement points of the travel route searched by the route search unit based on a user operation Means and
The scroll display control means determines the scroll speed according to a remaining distance from the current position of the vehicle to the destination , obtains a scroll movement distance based on the scroll speed, and determines the scroll movement distance from the current position. The next reference movement point corresponding to is obtained, the adjacent reference movement points are divided into minute movement points according to the rewriting speed by the display means, and the display of the map information is performed while synchronizing with the rewriting speed. A navigation device characterized in that the scrolling is performed in units of minute movement points . A display step of displaying map information on a predetermined display means;
A positioning step of positioning the current position of the vehicle by positioning means;
A route search step of searching for a travel route from the departure point of the vehicle to the destination by a predetermined route search means based on a user operation;
The map information is displayed by the display step along a plurality of reference movement points of the travel route searched by the route search step based on the user's operation in a direction toward the destination by a predetermined scroll display control means. A scroll display control step for scrolling
In the scroll display control step, the scroll speed is determined according to a remaining distance from the current position of the vehicle to the destination , a scroll movement distance is obtained based on the scroll speed, and the scroll movement distance from the current position is determined. The next reference movement point corresponding to is obtained, the adjacent reference movement points are divided into minute movement points according to the rewriting speed by the display means, and the display of the map information is performed while synchronizing with the rewriting speed. A map scrolling speed control method characterized by scrolling in units of minute moving points .

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