JP3955718B2 - Navigation device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a navigation device, and more particularly to a navigation device that scrolls and displays a map image in response to movement of a cursor position.
[0002]
[Prior art]
A navigation device that sets a desired point as a destination, searches for a guidance route to the destination, and scrolls and displays a map image corresponding to the movement of the cursor position, detects the position of the vehicle, and detects a DVD? Map data such as ROM is read out, a map image is displayed on the display screen based on the read map data, and a vehicle position mark is drawn at a predetermined location on the map image. Then, the guide route to the destination set by the user is calculated based on the map data, and the guide route is superimposed on the road on the map screen and displayed. In order for the user to check the guidance route, a cursor is displayed using an instruction unit such as a remote controller, and the map image is scrolled and displayed in accordance with the movement of the cursor position.
[0003]
[Problems to be solved by the invention]
However, in the conventional navigation device, in order to confirm the guidance route after searching for the guidance route to the destination, the scrolling operation can be performed along the shape of the guidance route using an instruction unit such as a remote controller along the guidance route. As shown in FIG. 4, the cursor CSR shown in FIG. 4A is scrolled along the guidance route RT, passes through the intersection C1, and deviates from the guidance route RT as shown in FIG. 4B. It was inconvenient because it could go away.
Accordingly, an object of the present invention is to provide a navigation device that automatically scrolls along a guide route without a user performing a scroll operation along the shape of the guide route when confirming the guide route. .
[0004]
[Means for Solving the Problems]
In the navigation apparatus that sets a desired point as a destination, searches for a guidance route to the destination, and scrolls and displays a map image corresponding to the movement of the cursor position, Determining means for determining whether or not the cursor position has moved to the vicinity of the guidance path according to the cursor position movement instruction of the instruction means, and determining that the cursor position has been moved to the vicinity of the guidance path by the determination means This is achieved by providing scroll control means for automatically starting scroll control along the guide route and reducing the scroll speed as approaching an intersection on the guide route.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
(A) General Description of the Present Invention FIG. 1 is a schematic explanatory diagram of the present invention, showing an example of operation when a user scrolls a map screen to confirm a guidance route searched by a navigation device.
DP is a display screen of the navigation device, CSR is a cursor, RT is a guidance route searched by the navigation device, C1 is a first intersection on the guidance route RT, and C2 is a second intersection on the guidance route RT.
[0006]
First, after the navigation route RT is searched for by the navigation device, the user moves the cursor to the vicinity of the guidance route RT using an instruction means, for example, a joystick of a remote controller (FIG. 1A). Thereafter, the navigation device automatically starts scrolling the map screen along the guidance route RT, and when the vehicle approaches a predetermined distance to the intersections C1 and C2 on the guidance route RT, the scroll speed is reduced to the predetermined speed and scrolled. When the vehicle is further than the predetermined distance from the intersection, the original scroll speed is restored (FIG. 1B).
[0007]
(B) Embodiment of the Invention (a) Configuration of Navigation Device of the Present Invention FIG. 2 is a configuration diagram of the navigation device of the present invention. In the figure, 11 is a map storage medium for storing map information, for example, DVD-ROM, 12 is a DVD-ROM control unit for controlling reading of map information from the DVD-ROM 11, and 13 is a vehicle position for measuring the current vehicle position. It is a measuring device, and includes a vehicle speed sensor that detects a moving distance, an angular velocity sensor that detects a moving direction, a GPS receiver, a position calculation CPU, and the like. 14 is a map information memory for storing the map information read from the DVD-ROM 11, 15 is a remote controller having a cursor movement key, menu selection operation key, map display enlargement / reduction operation key, and the like, and 16 is a remote control interface.
[0008]
17 is a processor (CPU) for controlling the entire navigation device, 18 is a ROM for storing various programs such as a map scroll program and a guidance route search program, 19 is a RAM for storing processing results of various programs, and 20 is a cursor for the displayed cursor. A cursor position determination unit 21 for determining the position, 21 is a normal scroll control according to the cursor position by the cursor position determination unit 20, a scroll control along the guide route, and a control for decreasing the scroll speed as approaching the intersection on the guide route It is the scroll control part which performs.
[0009]
22 is a map image generator for generating a map image, 23 is a video RAM for storing the map image generated by the map image generator 22, 24 is a menu image generator for generating various menu images, and 25 is a guide route generator. Yes, the processing result of the guidance route search processing program stored in the RAM 19 is used. Reference numeral 26 denotes a mark generation unit such as a vehicle position mark, 27 denotes an image synthesis unit that synthesizes and outputs various images, 28 denotes a display device that displays an image output from the image synthesis unit 27, and 29 denotes a bus.
[0010]
(B) Flowchart of the embodiment of the present invention FIG. 3 is a flowchart of the embodiment of the present invention.
First, the cursor position determination unit 20 determines whether or not the cursor position has moved to the vicinity of the guidance route (step 101). If the cursor position has not moved to the vicinity of the guidance route, the scroll control unit 21 performs normal scroll control. (Step 102). On the other hand, when the position of the cursor moves to the vicinity of the guide route, the guide route data stored in the RAM 19 is read (step 103).
[0011]
Next, the scroll control unit 21 starts scroll control along the guide route on the map screen based on the read guide route data (step 104). Next, the cursor position determination unit 20 determines whether or not there is an intersection within a certain distance ahead of the map screen in the scroll direction, for example, within 100 m ahead (step 105). If there is an intersection within 100 m, scroll control is performed. The unit 21 reduces the scroll speed to a predetermined speed, for example, 1/2 of the normal scroll speed (step 106). Next, the cursor position determination unit 20 determines whether or not the cursor has passed the intersection (step 107). If not, the process returns to step 106 and the scroll control unit 21 continues to scroll at 1/2 speed. do.
[0012]
On the other hand, when the cursor passes through the intersection, the scroll control unit 21 returns the scroll speed to the normal speed (step 108). Next, the cursor position determination unit 20 determines whether or not scrolling has been performed to a desired destination (step 109), and when not scrolling to the destination, the process returns to step 105 and continues scrolling. On the other hand, when scrolling to the destination is completed, after a predetermined time has elapsed, for example, after 10 seconds, the map display around the vehicle position is returned (step 110). In step 105, when there is no intersection within 100m ahead, the process of step 109 is performed.
[0013]
In this embodiment, the scrolling speed is reduced near all the intersections on the guidance route. However, since the guidance route data stored in the RAM 19 indicates where the guidance subject intersection is, the vicinity of the guidance subject intersection is obtained. It is possible only to slow down the scrolling speed.
[0014]
【The invention's effect】
As described above, according to the present invention, in the navigation device that sets a desired point as a destination, searches for a guidance route to the destination, and scrolls and displays a map image corresponding to the movement of the cursor position, the cursor Instructing means for instructing movement of the position, determining means for determining whether or not the cursor position has moved to the vicinity of the guidance path according to the instruction for moving the cursor position of the indicating means, and moving the cursor position to the vicinity of the guidance path by the determining means Scroll control means for controlling the scroll along the guide route and slowing down the scroll speed as approaching the intersection on the guide route when the guide route is confirmed. Provided is a navigation device that scrolls along a guide route without scrolling along the shape of Door can be.
[Brief description of the drawings]
FIG. 1 is a schematic explanatory diagram of the present invention.
FIG. 2 is a configuration diagram of a navigation device of the present invention.
FIG. 3 is a flowchart of an embodiment of the present invention.
FIG. 4 is a conventional scroll operation example.
[Explanation of symbols]
DP ··· Display screen CSR · · Cursor RT · · Guidance route C1 · · Intersection C2 to be guided · · Intersection

Claims (1)

Instructing means for instructing movement of the cursor position in a navigation device that sets a desired point as a destination, searches for a guidance route to the destination, and scrolls and displays a map image corresponding to the movement of the cursor position Determining means for determining whether or not the cursor position has moved to the vicinity of the guidance path according to the cursor position movement instruction of the instruction means, and when the determination means determines that the cursor position has moved to the vicinity of the guidance path, A navigation device comprising: scroll control means for automatically starting scroll control along a guide route, and for decreasing a scroll speed as approaching an intersection on the guide route.

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