KR19990001389A - Map Scrolling Method of Vehicle Navigation System - Google Patents

Abstract

In the map scrolling method of the vehicle navigation system according to the present invention, if there is a scroll input in the process of drawing the map ID stored in the queue on the frame memory, the scroll direction is determined and the drawing of the map ID opposite to the scroll direction is stopped. The new map ID is assigned to the stored map ID to complete the new nine maps.

Therefore, if it is necessary to change the map screen according to the scroll by the map scrolling method of the vehicle navigation system according to the present invention, after deleting all the map IDs stored in the queue, the map data storage unit does not newly search for 9 map IDs. Since only the map ID to replace the deleted map ID is searched and stored in the queue and drawn in the frame memory, the scrolled map screen can be quickly displayed on the indicator screen.

Description

Map Scrolling Method of Vehicle Navigation System

The present invention relates to a vehicle navigation system, and more particularly, to a map scroll method of a vehicle navigation system for scrolling a map screen in a direction desired by a user.

1 is a control block diagram showing the configuration of a general vehicle navigation system. As shown in FIG. 1, the vehicle navigation system receives a radio wave from three or more different Global Positioning System (GPS) satellites 15 simultaneously and calculates the longitude and latitude of the spot. Calculates the optimal route to the current location and destination, matches the calculated current location on the road map drawn from the map data storage unit 12 storing the road map data, and then displays the LCD through the indicator controller 18. It is displayed on the display unit 19 implemented by such as to visually guide the driver of the current position and direction of the vehicle.

In addition, in such an automatic navigation system, the user can enlarge and reduce the road map displayed on the display through a predetermined key operation provided in the key input unit 16, and at the same time, set the current position or the destination of the own vehicle and the next map screen. With keys to scroll.

In the automatic navigation system, the vehicle navigation control unit 21 reads nine maps displayed on the indicator screen from the map data storage unit and draws them in the frame memory 22 when the map screen scrolls. . At this time, when it is determined that the user inputs the map scroll key, the map screen is scrolled by drawing a new map in the frame memory 22 by searching the map adjacent to the currently displayed map screen according to the scroll direction.

In other words, in order to draw a map on the screen of the indicator 19, each of the nine maps corresponding to the position of the vehicle is given an independent ID, and the ID of the map to be drawn on the screen of the indicator 19 is a queue. It is stored in (not shown). Stored map IDs are taken out of the queue and drawn one by one in the frame memory 22. When all nine maps are drawn, the vehicle navigation controller 21 maps the new map IDs according to the scroll direction according to the scroll command input. Is stored in the queue, and the stored map ID is redrawn in the frame memory 22.

In the conventional map scrolling method, continuous scrolling of the map screen is impossible, and even though the user presses the scroll direction key continuously, the scrolled screen does not change in synchronization with the input of the scroll direction key and changes relatively slowly. There was a problem.

Accordingly, the present invention has been made to solve the above-mentioned conventional problems, and an object thereof is to provide a map scroll method of a vehicle navigation system which enables a user to scroll a map screen at high speed in synchronization with an input of a user's scroll key. I would like to.

1 is a control block diagram showing a configuration of a general vehicle navigation system;

2 is a flowchart showing a map scroll method of a vehicle navigation system according to the present invention;

3 (A) to (E) is an operation explanatory diagram showing an embodiment of the step ⓐ-ⓔ shown in FIG.

Explanation of symbols on the main parts of the drawings

11: map storage controller, 12: map data storage,

13: GPS receiver, 14: GPS antenna,

15: GPS satellites, 16: key input,

18: indicator control unit, 19: indicator,

21: vehicle navigation control section, 22: frame memory.

In order to realize the above object, the map scrolling method of the vehicle navigation system according to the present invention controls the vehicle navigation system to search for the map ID corresponding to the position of the own vehicle received from the GPS receiver, store it in a queue, and display it on the display screen. In the method, determining whether the scroll key is input and determining the scroll direction when the scroll key is input, deleting the map ID to be updated according to the scroll direction among the map IDs stored in the queue, and not remaining. Giving a new map ID according to a scrolling direction to a map ID, searching for a new map ID to replace the deleted map ID based on the scrolling direction, and storing the new map ID in a queue; And displaying a scrolled map screen based on the mapped map ID.

Hereinafter, the configuration and the effect according to the preferred embodiment of the present invention will be described in detail.

First, as shown in FIG. 1, the vehicle navigation system according to the present invention receives a radio wave from three or more different global positioning system (GPS) satellites 15 simultaneously and calculates the longitude and latitude of the GPS receiver. 13), a map data storage unit 12 storing road map data, and a longitude and latitude data received by the GPS receiver 13 to process the current position of the vehicle by the map data storage unit 12. Calculating a correlation between the vehicle navigation control unit 21 matching the map data provided from the vehicle navigation control unit 21, the driving trajectory of the vehicle tracked from the GPS satellites 15 and the road map data provided from the map data storage unit 12, Visually displays the map storage control unit 11 for correcting and calculating the position of the vehicle on the most correlated road and providing it to the vehicle navigation control unit 21 and the optimal road map to the current position and destination of the own vehicle. The display unit 18, the display control unit 18 for controlling the driving of the display unit 19 under the control of the vehicle navigation control unit 21, and the map data on which the current vehicle is located by the display control unit 18 A frame memory 22 which is temporarily stored for display on the indicator 19, and a key for selecting a map of a desired portion and setting an initial point at which the host vehicle is currently located on the displayed map and a direction to be moved. An input unit 16 is provided.

In such a configuration, the key input unit 16 includes an enlargement / reduction key of a map screen, a scroll key for moving the map screen forward and backward or left and right, and a reset key for resetting the system when the system is inoperable. .

FIG. 2 is a flowchart showing a map scrolling method of a vehicle navigation system according to the present invention having such a configuration, and FIG. 3 shows a state of a queue or frame memory in each of steps ⓐ to ⓔ of FIG.

As shown in FIG. 2, the map scroll method of the vehicle navigation system according to the present invention first determines the latitude and longitude of the host vehicle based on the GPS data received from the GPS receiver 13 in step S10. In step S12, the map data storage unit 12 searches for nine map IDs corresponding to the position of the host vehicle (Fig. 3 (A)). In step S14, the map ID searched in step S12 is sequentially stored in the queue (FIG. 3 (B)), and in step S16, the frame ID 22 is stored in the frame memory 22 based on the map ID stored in the queue. After drawing the chapter map, the map screen drawn on the frame memory 22 is displayed on the display screen 19.

At this time, it is determined whether the scroll key is input by the user in step S18. If the user inputs the scroll command as a result of the determination, in step S20, the GPS data value according to the position value of the host vehicle is set as the scroll center point. In step S22, it is determined whether the scroll area according to the scroll key input exceeds the boundary of the scroll center point (the outline of map ID 4 shown in Fig. 3C).

As a result of the determination, if the scroll area exceeds the boundary of the scroll center point, the scroll direction is determined in step S24. In this case, as shown in FIG. 3 (D) as an example, if the scroll direction is the first direction at the top of the screen, in step S26, three map IDs corresponding to the directions opposite to the scroll direction, that is, map IDs 6,7 and 8 Delete the burn from the queue.

In addition, in step S28, except for the deleted map IDs 6, 7, and 8, the map ID remaining in the queue is changed to a new map ID in consideration of the scroll direction. At this time, for example, as shown in FIG. 3E, the map ID 1 before the map ID change is changed to the map ID 4 which is the scroll center point after the movement according to the scroll movement direction, and the remaining map IDs are each new maps according to the scroll direction. It will be changed to ID.

At this time, in step S30, the new map ID replacing the deleted map ID is searched from the map data storage unit 12 to draw the nine scrolled maps on the display 19, and in step S32, the search is performed. Each map ID is stored on the queue as a new map ID, that is, map IDs 0, 1 and 2. Thereafter, in step S34, the map ID stored in the queue is stored in the frame memory to draw a newly scrolled map screen on the screen of the display 19.

That is, as described above, if there is a scroll key input while drawing a map in the frame memory, all nine map IDs stored in the queue are not drawn in the frame memory, and the direction opposite to the scroll direction. After stopping the drawing by determining the map IDs 6, 7, and 8 to be deleted according to scrolling, the new map IDs are searched to complete nine new maps corresponding to the scrolled direction.

As described above, in the map scrolling method of the vehicle navigation system according to the present invention, if there is a scroll input in the process of drawing the map ID stored in the queue on the frame memory 22, the scroll direction is determined and the map opposite to the scroll direction is determined. The drawing of the ID is stopped and the new map ID is assigned to the queued map ID to complete the new nine maps.

Therefore, when the map screen according to the scroll is required to be changed by the map scroll method of the vehicle navigation system according to the present invention, after deleting all the map IDs stored in the queue, a new search for the map IDs from the map data storage unit 12 is performed. Instead, since only the map ID to replace the deleted map ID is searched and stored in the queue and then drawn in the frame memory, the scrolled map screen can be quickly displayed on the display screen 19.

Claims (1)

In the control method of the vehicle navigation system to search for the map ID corresponding to the location of the own vehicle received from the GPS receiver, stored in the queue and displayed on the display screen, Determining whether a scroll key is input and determining a scroll direction when a scroll key is input, Deleting a map ID to be updated according to the scroll direction among the map IDs stored in the queue, and giving a new map ID according to the scroll direction to the remaining undeleted map IDs; Searching for a new map ID to replace the deleted map ID based on a scrolling direction and storing the new map ID in a queue; And displaying a scrolled map screen based on the new map ID and the updated map ID stored in the queue.