KR970004886B1 - Method for displaying the screen of a car nevigation system - Google Patents

Abstract

A navigation system for a car and a displaying method of a display screen thereof which display a location cursor and a destination information cursor are disclosed. In the method, a current location of a car is duplicated on map data by a location cursor. A distance of a direction of a destination is obtained based on the current location of a car. A destination information cursor is displayed on a road map with the location cursor wherein the destination information cursor represents a distance and a direction of the destination based on the location cursor.

Description

Vehicle navigation system and display screen display method

1 is a block diagram of a conventional vehicle navigation system.

2 is a view for explaining the route selection from the current position of the vehicle to the destination in FIG.

3 is an overall system configuration diagram of the present invention.

4 is a configuration example of the display device of FIG.

Fig. 5 (a) shows a destination setting cursor on the display device, and (b) shows a destination set on the display device.

6 is a flow chart for explaining the operation of the present invention.

7 (a) and 7 (b) are other structural examples of the destination information cursor.

* Explanation of symbols for main parts of the drawings

21: display device 21A: map display screen

21B: operating device 22: graphics generating circuit

23: key scan circuit 24: GPS antenna

25: GPS receiver 26: CD-ROM

27: CD-ROM driver 28: CD-ROM interface circuit

29: signal processing device

The present invention relates to a vehicle navigation system for displaying a current position and a direction of a vehicle on a road map, and a display screen display method thereof, and more particularly, to a position for displaying a position and a direction of a host vehicle on a road map. A vehicle navigation system and a display screen display method for displaying a cursor and a destination information cursor for displaying a direction and a distance of a destination centered on the cursor.

In general, the navigation system for a vehicle was mostly to display the current position of the vehicle on a map of the screen. However, in this case, only the current position of the vehicle is displayed, which is inconvenient because the driver cannot know in which direction and how much to go to the destination to go to. Therefore, the navigation system of the type which selects the road having the shortest distance from the current position of the vehicle to the destination and displays it on the road map (Japanese Patent Laid-Open No. 4-319619) is shown in FIG. 1.

That is, such a conventional vehicle navigation system includes a display device 1 for displaying a current position of a vehicle, a destination, and a route to a destination on a road map, and an operation for specifying a destination, a route search, a route extraction condition, and the like. Device 2, a storage device 3 for storing information (transmission network data) which is a condition for path search and path extraction, an arithmetic device 4 for calculating information that is a condition for path search and path extraction, and A route retrieval control device (5) for controlling route retrieval and route extraction based on the coordinates of the destination by the designation of the operation device (2), route retrieval, and route extraction conditions; and the storage device (3). Selector 6 for selecting data stored in the data storage device and data outputted from the computing device 4, and data stored in the storage device 3 and data outputted from the computing device 4; Selector (6) And a route retrieving device (7) for retrieving a combination of conducting road segments or a combination of all highway segments that reach the destination from the current location based on the data, and the data stored in the storage device (3). And a combination of the conductive path segments or the highway segments corresponding to the optimum route between the current position of the vehicle and the destination based on the data, by reading the data output from the associating apparatus 4 through the selecting apparatus 6. A path extracting apparatus 8 for extracting a combination, a current position detecting apparatus 9 for detecting a speculative current position by calculating an integrated bearing direction and an integrated distance according to a driving, and highlighting the optimal path and the estimated current position on a road network And a signal for highlighting the shortest time path and the estimated current position on the road network. It is composed of an induction device 11 which supplies the display device 1 to guide the vehicle and at the same time stores the required time of running the segment at an angle in the required time memory of the storage device 3.

In the conventional vehicle navigation system configured as described above, if there is no initial setting input, the road network being driven is displayed and the estimated current position is highlighted. If there is an initial setting input, the optimum route to the destination is created. The optimal route is displayed along with the road network and the estimated current position to guide the vehicle.

That is, when the driver designates the destination, the route search, and the route extraction condition, the route search controller 5 searches the route, the route based on the data of the current position and the coordinate position and route search and the route extraction condition of the destination. Determine the method of extraction.

Based on the method specified by the route retrieval apparatus 7, data corresponding to the route around the route from the current position of the vehicle to the destination of the road network data in the storage apparatus 3 is read out through the selection apparatus 6; To retrieve the set of paths to reach the destination.

For example, in the route retrieval apparatus 7, as shown in FIG. 2, when the distance from the current position to the destination is long, from the current position P1 of the vehicle to the interchange P2 closest to the current position of the vehicle. The first section of the vehicle, the second section from the interchange P2 closest to the current location of the vehicle to the interchange P3 closest to the destination, and the third section from the interchange P3 closest to the destination to the destination P4. It divides into three sections of the section and simultaneously performs the tycoon of the best route in these three sections.

Next, the route extraction device 8 takes the driving time, the waiting time by the right and the waiting time of each road segment of the segment (month, day of the week, and time zone) corresponding to the time when the destination is designated based on the designated method. The data for path extraction, etc. are read from the conduction path time memory, the expressway time memory, the signal waiting time memory, and the right return operation device in the storage device 3 and the computing device 4, respectively. The running route is summed up, and the optimum route to the destination is selected by comparing the route extraction conditions such as the time required for each route set.

The emphasis signal generating unit 10 generates a signal for highlighting the selected optimal path, and the induction device 11 supplies a signal for highlighting the optimal path to the display device 1 to display the display device ( In step 1), the optimal route to the destination set by the driver is highlighted.

However, in the conventional vehicle navigation system as described above, even the number of circumferences to the destination and the signal waiting time are completed, the optimal route is selected and the selected route is highlighted on the display device, but the distance to the destination is not displayed. I did not know how far. In addition, when the route to the destination displayed on the display device during driving cannot be traveled, there is a need to reset the destination every time during the driving.

On the other hand, in another type of vehicle navigation system that displays information to a destination, several steps of operation (for example, the current vehicle) are not displayed on the road map on the screen so that the information about the destination can be known at the same time. If you press the operation key on the screen that shows the location, the screen for setting the destination will appear, and if you press the operation key of the time, the information on the destination will be displayed). In this case, the information about the destination is displayed in letters or numbers, for example, 270 degrees, 15 km, etc., so that the driver could not easily know, and the information about the destination is not displayed on the screen such as the current vehicle location display. As a result, it was impossible to obtain information about the current location and the destination at the same time.

SUMMARY OF THE INVENTION The present invention has been made to solve this problem, by displaying the current location of the vehicle overlapping on the road map on the display screen, and graphically displaying the destination information cursor around a certain distance of the location cursor with respect to the displayed current location. The present invention provides a vehicle navigation system and a display screen displaying method thereof so that a location and a distance to a destination can be simultaneously known.

That is, the position detecting means for receiving a signal from the GPS satellite through the GPS antenna and sensing the position of the own vehicle, the storage means storing the map data, the map data from the position detecting means and the memory means and the position information of the vehicle. A signal processing means for outputting the current driving position data of the vehicle on the road map, the road map, and a display means for displaying the output signal of the signal processing means to measure the current position of the vehicle and measure the current of the measured vehicle. In a vehicle navigation system for displaying a position on a road motion by means of a position cursor, the position of the host vehicle is synthesized by the position data in the map data, the distance and the direction of the destination are calculated on the display means, and On the road map that is displayed, the object is focused on the position cursor under the control of the signal processing device. The destination data cursor indicating the direction and distance to one that appears on the screen the position of the cursor. Hereinafter, the present invention will be described in detail with reference to the drawings.

3 is a block diagram of the entire system of the present invention, which includes a map display screen 21A composed of a color LCD and a manipulation apparatus 21B composed of a plurality of operation keys used for navigation, and a map. A graphics generating circuit 22 for generating graphic data of a screen such as a graphic and a cursor, a key scanning circuit 23 for checking key input from the operation device 21B, and a GPS (Global Positioning System) antenna 24 GPS receiver 25 for sensing the position of the vehicle by processing the GPS signal from the CD-ROM driver, a CD-ROM driver 27 for driving the map data stored in the CD-ROM 26, and the CD-ROM driver 27) CD-ROM interface circuit 28 which reads map data from the map data and converts the data, and controls the respective parts 21-28 and receives the data from the GPS receiver 25 for accurate current of the vehicle. Calculates the traveling position and presses the operating device 21B Depending consists of the signal processing device 29 which receives the CD-ROM with map data input through the interface circuit 28 to display it on the map screen (21A) through the graphic generation circuit 22.

4 shows an example of the display device 21, where 21A is a map display screen, and keys located on the left side of the map display screen 21B are various operation keys located on the operation device 21B. GPS key 31, Set key 32, Zoom-in and Zoom-out keys 34, 33 and Map Search for Map Search A key 35, a cursor frame key 36 for determining and moving the direction of the cursor frame, and a destination setting cursor 40 are provided on the screen, and a map direction key for moving the destination setting cursor 40 ( 37, (38) is the position cursor of the host vehicle, and (39) is the destination information cursor.

The operation of the present invention configured as described above will be described in more detail based on the flowchart of FIG.

First, power is supplied (the power supply is not shown in the figure), the graphic generating circuit 22, the key scanning circuit 23, the GPS receiver 25, the CD-ROM interface circuit 28, and the signal When the parts for navigation of the processing device 29 and the like are reset, the CPU in the signal processing device 29 initializes the circuit and the memory of each part (110) and drives the key scan circuit 23 to drive the fourth. A key scan for detecting the pressing of the various operation keys 31 to 37 shown in FIG. 120 is performed (120).

In this case, while detecting the depression of the map searcher 35 (130), the signal processing device 29 drives the CD-ROM driver 27 to read the map data stored in the CD-ROM 26 by the CD-ROM interface circuit. After reading through (28), it is stored in the storage device in the signal processing device 29, and this data is input to the graphic generating circuit 22 so as to be processed as a map graphic to be displayed on the screen. Accordingly, as shown in FIG. 5A, the map 41 and the grid 42 are displayed on the map display screen 21A (140).

If it is determined in step 150 that the cursor frame key 36 is pressed and it is determined that the cursor frame key 36 has been pressed, the cursor frame 43 of the cursor frame key 36 If it is determined that the cursor frame key 36 is not inputted, the controller 110 moves to operation 120 and returns to step 120.

After performing the step 160, the process proceeds to step 170, and if the input of the zoom-in key 34 is detected and it is determined that the zoom-in key 34 is pressed, the map display screen is displayed in more detail than the currently displayed map. It displays on (21A) (180). If it is determined that there is an input of the zoom-out key 33 (190) and it is determined that there is an input of the zoom-out key 33, a wider map is displayed than the currently displayed map (200). If it is determined that there is no input of the zoom-in key 34 and the zoom-out key 33, the process returns to step 120.

On the other hand, the meaning of displaying a detailed map on the map display screen 21A or a map of a wide area is as follows. In general, when a map is displayed in a navigation system, a map is displayed in a wide area or in a detailed map. A wide map (level 1 map) is a map of the entire country, and a map of the next level (level 2 Map) means a map that can display one province, and the map of the next level (map of level 3) is a map of one county, and the map of the next level (map of level 4) Is a detailed map of all roads. Therefore, maps of level 4 gather to form level 3 maps, maps of level 3 gather to form level 2 maps, and maps of level 2 gather to form level 1 maps.

In addition, to determine a destination on the map searched through the steps 120 and 200, the map direction key 37 is pressed, and in step 210, the input of the map direction key 37 is sensed (210). If it is determined that there is no input of (37), the process returns to the step 120. When there is an input of the map direction key 37, the destination setting cursor 40 of FIG. 5A is displayed on the map display screen 21A. Provided to and displayed by moving the destination setting cursor 40 in accordance with the direction of movement of the map direction key 37 (220). In this way, search for the desired map and press the set key 32 in accordance with the starting point to go to the destination setting cursor 40, in step 230 checks the input of the set key 32, the input of the set key 32 If it is determined that there is no, return to the step 120, and if it is determined that there is an input of the set key 32, the coordinate value of the position of the destination setting cursor 40 displayed on the map display screen 21A is stored in the memory (240). In step 250, the destination 44 set as shown in FIG. 5B is displayed.

In this manner, when the map search or the destination setting is completed, the process returns to the step 120 and after performing the step 120, the step 130 is performed to determine whether the map search key 35 is input. If it is determined in step 130 that there is no input of the map search key 35, the process proceeds to step 260 and checks whether the GPS key 31 is input.

If it is determined in step 26 that there is no input of the GPS key 31, the process returns to step 120. If it is determined that there is an input of the GPS key 31, the signal processing apparatus 29 receives the GPS receiver 25. The GPS receiver 25 is a GPS satellite (a satellite for navigational purposes launched by the U.S. Department of Defense for military purposes) by communicating with a certain protocol. It is a navigational positioning satellite, arranged in four on six tracks to cover the entire map, and when receiving at least three satellites using the GPS receiver 25 can calculate the current vehicle position, driving direction, speed, etc. And tracking the position of the own vehicle by checking three or more positions (270). If the position data is valid, if it is not valid, the display indicates that the GPS is invalid (NO) (280) and the step (120). )in If it is valid, the position coordinates are received from the GPS receiver 25 and converted into map coordinates on the screen in step 290. The GPS is not valid in that the GPS receiver 25 still has three or more GPS satellites. This means that the GPS satellite 24 does not receive or does not receive the GPS satellite due to the obstacle.

The CD-ROM driver 27 drives the default map determined by the system, reads the map around the current vehicle, and displays it on the map display screen 21A (300). The position cursor shown in FIG. 38 is displayed superimposed on the road 41 on the road map (310).

At this time, the driver may perform a zoom in / out function as needed. When the zoom in / out keys 34 and 33 are pressed, the signal processing unit 29 scans the keys of the key scanning circuit 23. This is detected through the operation (320) and the corresponding zoom-in / out processing (330), if the zoom-in / out key (34), 33 is not pressed returns to the step 120 do. Here, the steps 320 and 330 perform the same functions as the steps 170 and 200, but are weakly displayed.

After performing the step 330, the process proceeds to the step 340, and it is determined whether there is destination setting data in the storage device of the signal processing apparatus 29, and when it is determined that there is no destination setting data, the process returns to the step 120. If it is determined that there is destination setting data, the signal processing device 29 calculates the direction and distance from the current vehicle's position to the set destination to make a destination information cursor 39 and focuses on the location cursor 38 as shown in FIG. Overlapping on the map (350), and returns to the step 120.

The number 16 of the destination information cursor 39 displayed mainly on the location cursor 38 in FIG. 4 means that the distance to the destination is 16 km, and the direction of the destination is northeast from the current vehicle position.

Unlike the above, as shown in FIGS. 7A and 7B, the destination information cursor may be displayed on another portion of the map display screen 21A or processed as a window without centering the location cursor.

As described above, according to the present invention, the direction and distance of the destination can be easily recognized by graphically displaying the direction and distance to the destination at all times, and the distance to the destination is simultaneously displayed with the destination information cursor. Therefore, it is possible to estimate the time it takes to reach the destination. In addition, the direction and distance of the destination are displayed in real time with the position cursor without the operation of several levels of keys, which helps the driver to drive safely.If only the purpose is explained, it is always on the screen regardless of which road is selected. Information on the distance and direction of the destination is displayed, thereby eliminating the need to reset the destination while driving.

Claims (1)

A position detecting means 25 for receiving a signal from a GPS satellite via a GPS antenna 24 to sense the position of the host vehicle, a storage means 26 storing map data, the position detecting means 25 and a storing means. A signal processing means 29 for synthesizing the map data from the vehicle 26 with the position information of the vehicle and outputting current road position data of the vehicle on the road map and the road map, and output signals of the signal processing means 29; A vehicle navigation display method comprising: a display means (21) for measuring a current position of a vehicle and displaying the measured current position of the vehicle on a road map by using a position cursor; The distance and the direction of the destination are calculated based on the position of the own vehicle, and the distance and the room of the destination based on the location cursor are displayed on the displayed road map. Destination information car navigation display screen display method, characterized in that at the same time so that the cursor is displayed graphically with the cursor position indicates the.