JP2005083996A - Navigation device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a navigation device displaying more effective map by switching a display screen according to a present position, concerning a navigation device for two-screen display. <P>SOLUTION: This navigation device reads out map information including the present position detected by a present position detection means from a map information storage part, and displays it selectively on the first display region having the first area or on the second display region having a larger area than the first display region on a display screen of a display means following a measure inputted by an input means. In the device, when the map information is is chosen to be displayed on the first display region with a prescribed measure inputted by the input means, and when the map information is displayed on the second display region according to the prescribed measure of the map information displayed on the first display region, if the destination is determined to be indicatable, the map information is displayed with the prescribed measure on the second display region. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a navigation device capable of multi-screen display.

Conventionally, in a navigation device, a display screen is divided into two display areas, a detailed road map around the vehicle is displayed in one display area, and a route map of the guidance route is displayed in the other display area. (For example, refer to Patent Document 1).
JP-A-6-307879 (page 2-5, FIG. 1)

  However, in the above-described conventional navigation device, the display screen is divided into two display areas, so that the area of the map displayed in each display area becomes narrow. Therefore, if you want to check the route by displaying the current position and the destination at the same time, even if the current position and the destination are close, you will have to switch to a smaller scale map, which may make it difficult to check the route. There is a problem.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a navigation device that enables more effective map display by switching the display screen according to the current position.

  In order to achieve the above object, a navigation apparatus according to the present invention comprises a current position detecting means for detecting a current position, a map information storage means for storing map information, and a display means for displaying map information stored in the storage means. And an input means for inputting a scale of map information to be displayed on the display means and a destination, and reads out map information including the current position detected by the current position detection means from the map information storage unit, A navigation device capable of selectively displaying in a first display area having a first area of a display screen of the display means or a second display area wider than the first display area in accordance with a scale inputted by the input means. The map information is displayed in the first display area when the map information is selected to be displayed on the predetermined scale inputted by the input means. Wherein the destination is determined to be displayed when displaying the map information in the second display region in accordance with the predetermined scale of Figure information is displayed on the second display area the map information at the predetermined scale.

  An input means for inputting a destination; a current position detecting means for detecting a current position; a map information storage means for storing map information; and a display means for displaying map information stored in the map information storage means; The map information storage means stores map information in a range that can be displayed in a first display area having a first area of the display screen of the display means including the current position detected by the current position detection means. In the navigation device for reading and displaying, when the destination information input by the input means is not included in the map information in the range that can be displayed in the first display area, the range in which the map information can be displayed is displayed in the first display area. If the display range is wider than the second display area, it is determined whether or not the destination is included. If it is determined that the destination is included, the map information of the range that can be displayed in the second display area is determined. Comprising display control means for reading display from the map information storage means.

  The first display area is an area that is less than half of the display screen, and the second display area is the entire display screen.

  The first display has an input means for inputting a destination, a current position detection means for detecting a current position, a map information storage means for storing map information, and first and second display areas. A map where the current position detected by the current position detection means is superimposed on the map information read from the map information storage means and displayed in the area, and the map displayed in the first display area in the second display area Display means for displaying map information different from the information, and a third display area including the first and second display areas of the display means when the destination cannot be displayed in the first display area of the display means If the map information displayed in the first display area is displayed, it is determined whether the destination input by the input means can be displayed, and the destination can be displayed in the third display area. If it is determined, the first display area It includes a display switching means for displaying the map information displayed on the third display area, the.

  The map information displayed in the first display area is an enlarged map, and the map information displayed in the second display area is a wide area map.

  According to the navigation device of the present invention, when the current position reaches the vicinity of the destination, the current map and the target position can be confirmed at the same time so that one of the displays can be erased and a map area that can be displayed is displayed large. By doing so, the display becomes easy to see.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a main part of a navigation apparatus according to the present invention.

  Reference numeral 1 denotes a control circuit composed of a microcomputer or the like, which controls the entire navigation device based on a program written in the ROM 2. The GPS receiver 3 receives radio waves from GPS satellites, measures the current position, and outputs measurement data to the control circuit 1. Reference numeral 4 denotes a map storage unit which reads map information from an optical disc such as a DVD in which map information necessary for map display and route search is written and outputs the map information to the control circuit 1. The map information is not limited to being stored on the optical disc, but may be another disc-type storage medium, or may be acquired and stored by communication.

  Reference numeral 5 denotes a display unit composed of a liquid crystal monitor, which displays map information and the like based on image data output from the control circuit 1. An input unit 6 is connected to the control circuit 1 and has a switch for inputting various commands (for example, enlargement / reduction of map data, setting of a destination, etc.). 7 is a route search unit, and a map stored in the map storage unit 4 is a route that connects a starting point and a destination (or parking lot) input by the user via the input unit 6 under a predetermined condition. Search based on information. For example, a route having the minimum cost under various conditions such as the shortest distance and the shortest time is extracted. A RAM 8 temporarily stores control data of the control circuit 1 and map information read from the map storage unit 4. Reference numeral 9 denotes a voice output unit for notifying route guidance by voice.

  Here, map information is demonstrated. The map information is managed by dividing the whole country into small sections (hereinafter referred to as regional meshes), and the control circuit 1 reads map information in a necessary range in units of regional meshes. In addition, the map information is converted into data as nodes indicating road intersections, inflection points, etc., and straight lines connecting the nodes, that is, links, together with the position coordinates and attribute information of each node and each link. It is remembered. This attribute information includes types of roads such as highways, national roads, and general roads, connection information of intersections and roads, information of facilities such as stations, hotels, and government offices around the roads.

  Next, the map information displayed on the display unit 5 will be described. FIG. 2 shows a display example of the display unit 5. The display area of the display unit 5 can be divided into a first display area 41 and a second display area 42, and road maps of different scales selected in advance by the user are displayed in both display areas 41 and 42, respectively. Here, the road maps having different scales are, for example, road maps having a scale of 1 / 1.25 million to 1 / 2000,000 and can be displayed at a scale set in the display areas 41 and 42 of the display unit 5. .

  FIG. 3 is an explanatory diagram when the map information to be displayed on the display unit 5 is extracted from the map information read from the map storage unit 4 and stored in the RAM 8. The control circuit 1 reads out the map information of the scale previously selected by the user from the map storage unit 4 and stores it in the RAM 8. A range that can be displayed in the display area of the display unit 5 is extracted from the map information stored in the RAM 8 and displayed on the display unit 5. For example, it is assumed that the map information 30 shown in FIG. A range that can be displayed in the display area of the display unit 5 from the map information (when the map information 30 is displayed in the display area 41 or 42 as shown in FIG. 2, the area 31 surrounded by the broken line in FIG. When the display area is not divided and displayed as shown in FIG. 2, the area 32) is cut out, and the mark 43 indicating the current position calculated by the GPS receiving unit 3 in the cut-out map information and the guidance searched by the route searching unit 7 The destination 45 input via the route 44 and the input unit 6 is superimposed and displayed on the display unit 5.

  FIG. 4 is a flowchart showing the operation of the control circuit 1. The actual operation will be described with reference to this flowchart and the display example of the display unit 5 shown in FIG.

  First, when a power switch (not shown) of the navigation device is turned on, in step S1, a scale of map information to be displayed on the destination and the display unit 5 is input by the user via the input unit 6, and the GPS receiving unit 3 is used to input measurement data at the current position. In step S2, map information from the map storage unit 4 to the measured current position and the set destination is read out from the map information of two scales selected in advance by the user and stored in the RAM 8. . At this time, if the destination is far and the data amount exceeds a predetermined value, the data is divided appropriately and first read out from the map information around the current position.

  In the following step S3, the route search unit 7 is searched for a route from the current position to the destination, and the searched optimum guidance route is stored in the RAM 8, and in step S4, a priority display area is displayed by the user via the input unit 6. (That is, which map information is to be viewed mainly from among the display areas 41 and 42 shown in FIG. 2) is input (in the example of FIG. 2, the display area 41 is selected).

  In step S5, when the measurement data of the current position is input from the GPS receiver 3, in step S6, displayable areas are cut out from the two scale map information stored in the RAM 8. In step S7, it is determined whether or not the destination can be displayed in the map information displayed in the priority display area in step S4. If the destination can be displayed (Y in step S7), it is cut out in step S6. A mark 43 indicating the current position measured in step S5, the guide route 44 searched in step S3, and the destination 45 input by the user via the input unit 6 in step S1 are superimposed on the displayed map information. 5 and a wide area map including the current position is displayed in the display area 42 (see FIG. 2A) (step S8).

  If the destination is not displayed in step S7 (N in step S7), whether or not the destination can be displayed is displayed by displaying the map information displayed in the priority display area 41 selected in step S4 on one screen. Determine (step S9). If it is determined in step S9 that the destination can be displayed (Y in step S9), the display of the map information displayed in the display area not selected in step S4 (area 42 in FIG. 2) is deleted. The map information displayed in the priority display area 41 is enlarged and displayed in an area including the areas 41 and 42 (step S10) (see FIG. 2B).

  If it is determined in step S9 that the destination cannot be displayed (N in step S9), the process proceeds to step S8, and the map information is displayed in the display areas 41 and 42, respectively.

  Then, when one screen is displayed, steps S5 to S10 are repeatedly performed, and the current position and the destination approach as the current position moves, and the displayed map information is displayed in the divided display area. When the destination can be displayed (Y in step S7), the map information deleted in step S10 is displayed again to perform two-screen display (see FIG. 2C).

  Thus, when the map information is displayed on one screen, it is determined whether or not the destination is displayed. If it is determined that the destination can be displayed, the map information displayed in the display area 42 is displayed. Since the display is erased and the map information displayed in the priority display area 41 is displayed with an enlarged display range, there is no need to switch to a small scale map even when the current position and the destination are close. This makes it easier to check the route.

  In the embodiment described above, when the map information is displayed on one screen, it is determined whether or not the destination is displayed. If it is determined that the destination can be displayed, the map information is displayed in the display area 42. The display of the map information is erased and the map information displayed in the priority display area 41 is displayed with an enlarged display range. However, the present invention is not limited to this. For example, the current position and the destination When the distance approaches within a predetermined distance, the display of the map information displayed in the display area 42 is erased assuming that the destination can be displayed, and the display range of the map information displayed in the priority display area 41 is expanded. You may make it display.

In the embodiment described above, it is determined whether the destination can be displayed and the display of the map information is switched. However, the present invention is not limited to this. For example, the route from the current position to the destination is used. When the place is set, it may be determined whether the waypoint can be displayed and the display of the map information may be switched.

It is a block diagram which shows the structure of the principal part of the navigation apparatus of this invention. It is a figure which shows the example of a display of the navigation apparatus of this invention. It is a figure explaining the display range of the map information of the navigation apparatus of this invention. It is a flowchart which shows operation | movement of the control circuit of the navigation apparatus of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Control circuit 3 GPS receiving part 4 Map memory | storage part 5 Display part 7 Path | route search part 41,42 Display area

Claims (5)

Current position detecting means for detecting the current position;
Map information storage means for storing map information;
Display means for displaying the map information stored in the storage means;
Input means for inputting a scale and a destination of map information to be displayed on the display means,
Map information including the current position detected by the current position detection means is read from the map information storage unit, and a first display having a first area of the display screen of the display means according to the scale input by the input means A navigation device capable of selectively displaying in a region or a second display region wider than the first display region,
The map information according to the predetermined scale of the map information displayed in the first display area when the map information is selected to be displayed on the first display area at the predetermined scale input by the input means. When the map is displayed in the second display area and the destination is determined to be displayable, the map information is displayed in the second display area with the predetermined scale. An input means for inputting a destination;
Current position detecting means for detecting the current position;
Map information storage means for storing map information;
Display means for displaying the map information stored in the map information storage means,
Navigation for reading out and displaying from the map information storage means the map information in a range that can be displayed in the first display area having the first area of the display screen of the display means including the current position detected by the current position detecting means. In the device
A second display area in which the map information displayable range is wider than the first display area when the map information in the range displayable in the first display area does not include the destination input by the input means If it is within the displayable range, it is determined whether or not the destination is included. A navigation device comprising a control means.   The navigation apparatus according to claim 1 or 2, wherein the first display area is an area that is less than half of the display screen, and the second display area is an area of the entire display screen. An input means for inputting a destination;
Current position detecting means for detecting the current position;
Map information storage means for storing map information;
Having a first and a second display area, and displaying the current position detected by the current position detection means in the first display area superimposed on the map information read from the map information storage means, Display means for displaying map information different from the map information displayed in the first display area in the second display area;
The map displayed in the first display area in the third display area including the first and second display areas of the display means when the destination cannot be displayed in the first display area of the display means. If the information is displayed, it is determined whether or not the destination input by the input means can be displayed. If it is determined that the destination can be displayed in the third display area, the information is displayed in the first display area. Display switching means for displaying the generated map information in the third display area;
A navigation device characterized by comprising: 5. The navigation apparatus according to claim 4, wherein the map information displayed in the first display area is an enlarged map, and the map information displayed in the second display area is a wide area map.

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