JP2003186392A - Map display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To permit a map showing a point and being displayed on a display screen to be easily grasped when the map is scrolled, in a map display device of a car navigation device. <P>SOLUTION: When the scroll operation is performed, the display screen is divided. The map to be scrolled is displayed on one of the divided screen, and a wide area map is displayed on another divided screen to display the scrolled point in the wide area map. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a map display device having a structure capable of moving the range of a map displayed on the screen of the display device.

[0002]

For example, in a car navigation system, the range of the map displayed on the display screen of the display device can be scrolled, and by this scrolling, the map around the present location can be spread over a wide range. I am able to see it.

However, when a detailed map (large scale is scrolled) is scrolled, there is a problem that it is difficult to know where and how to scroll and which point is currently displayed. In particular, in recent car navigation devices, the speed of map scrolling is increasing so that the destination of a map can be reached faster with the improvement of hardware performance. For this reason, the display map can be moved to a long distance with a little scroll operation, and it tends to be more difficult to understand which point is currently displayed.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to easily determine the location of a map displayed on a display screen when a map display range is moved. To provide a recognizable map display device.

[0005]

In order to achieve the above object, the present invention divides a display screen when a map display range is moved, and displays a map whose display range moves on one divided screen. However, since the wide area map is displayed on another split screen and the position of the map displayed on one split screen is displayed on this wide area map, it is possible to easily recognize the location of the map displayed on the display screen. You can

In this case, the scale of the map to which the display range is moved is determined, and the display screen is divided only when the scale is a certain value or more, that is, when the detailed detailed map is being moved. A wide area map may be displayed.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a car navigation system will be described below with reference to the drawings. FIG. 2 is a block section showing the overall configuration of the car navigation device 1. As shown in the figure, the car navigation device 1 includes a control circuit 2, a position detection device 3 as position detection means, a map data storage device 4 as map data storage means, a group of operation switches 5, a display device 6, and a sound generator. Device 7, VICS receiver 8, external data input / output device 9,
The mobile phone connection device 10, a remote control sensor 11, and a remote control 12 paired with the remote control sensor 11 are provided.

The control circuit 2 includes a car navigation device 1
It has a function of controlling the overall operation of, and is mainly configured by a microcomputer. That is, the control circuit 2 is configured to include a CPU, a ROM, a RAM, an I / O, a bus connecting these, and the like (all not shown). Of these, the ROM stores an execution program for operating the car navigation device 1, and the RAM stores temporary data during program execution, map data acquired from the map data storage device 4, and traffic acquired from the VICS receiver 8. Information is stored temporarily.

The position detecting device 3 is a gyroscope 1
3, distance sensor 14 and GPS (Global Positioning)
System) The receiver 15 and the like. Since these sensors 13 to 15 have detection errors with different properties, by combining these sensors 13 to 15, it is possible to perform highly accurate position detection while correcting the detection errors. Depending on the required detection accuracy level, all the sensors 13 to 1
5 does not need to be provided, and a configuration in which it is appropriately selected and provided can be employed. Further, the position detection device 3 may be configured by combining a geomagnetic sensor, a steering rotation sensor, a wheel sensor that detects the rotation of each tire, and the like.

The map data storage device 4 is, for example, a DVD-
It is composed of an information recording medium such as a ROM and a reading device for reading map data from the information recording medium. The reading device reads map data, map matching data, data for guiding a route by voice, and a map based on a place name. Search data for searching the upper position is read from the information recording medium and input to the control circuit 2.

The display device 6 comprises a display screen such as a liquid crystal display, and can display map data, characters or symbols on the display screen. The operation switch group 5 inputs data,
It is used when inputting setting items or moving, for example, scrolling a map, and is composed of various operation switches such as a touch switch or a mechanical switch integrally provided on the display device 6. There is.

The VICS receiver 8 is an external information source V
The road traffic information transmitted from the ICS is received and input to the control circuit 2 as a detection means. The control circuit 2 is a VIC
Based on the road traffic information input from the S receiver 8, a traffic regulation point, a congested road and its congested section, etc. are detected.

The external data input / output device 9 is configured to detachably mount a flexible disk as an information recording medium, a memory stick, or the like to read or write information from the information recording medium. The mobile phone connection device 10 is connected to a mobile phone to read information received by the mobile phone and to send information from the mobile phone.

The control circuit 2 has a function as display control means, calculates the current position of the vehicle based on the information input from the position detection device 3, and based on the map data, a road map around the current position. Is displayed on the display screen of the display device 6, and a pointer indicating the current position and traveling direction of the vehicle is displayed on the road map on the display screen. The scale of the road map displayed on this display screen is the operation switch group 5
It can be changed by the operation of.

The control circuit 2 has a function of setting a route to a destination and a traveling guide function of giving a voice from the voice generating device 7 to indicate a direction in which the vehicle should travel in accordance with the route. . That is, when the destination or the passing point is input by operating the operation switch group 5 or the remote controller 14, the optimum route from the current position to the destination is automatically set as the destination route, and the destination route is displayed by the display device 6. It is highlighted on the road map displayed on the display screen of. Then, the control circuit 2 gives voice guidance in the traveling direction of the vehicle in accordance with the destination route. The Dijkstra method or the like is used as a method for setting the optimum route.

When the VICS receiver 8 receives information about a traffic jam point, a traffic regulation point, a traffic jam point such as a cause of traffic jam or a traffic jam length while the vehicle is traveling, the control circuit 2
The obstacle information is notified by voice, characters are displayed on the display screen of the display device 6, and the traffic obstacle point is displayed on the road map.

By the way, the control circuit 2 has a function as a map movement control means, and when a scroll operation is performed by the operation switch group 5 as a map movement operation means, the display screen of the display device 6 is displayed based on the map data. Move the map displayed in to up, down, left, right (east, west, north, south). In this case, if the scale of the scrolled map is a detailed map smaller than a predetermined value, the control circuit 2 divides the display screen of the display device 6 into two,
A map that is scrolled to one split screen is displayed, a wide area map whose scale is smaller than the scroll map is displayed on another split screen, and the position of the map currently displayed on one split screen is displayed in the wide area map. indicate.

The control contents of the control circuit 2 at the time of scrolling will be described with reference to the flowchart of FIG. That is, when the switch operation for scrolling is performed, "YES" in step S1), the control circuit 2 causes the current display screen of the display device 6 to be divided into two screens, which are divided into left and right as shown in FIG. It is judged whether or not it is being displayed (divided screen existence judging means, step S2). When two screens are being displayed, the control circuit 2 determines “YES” in step S2, displays a scrolled map on one screen, for example, the left screen, and displays the map on the right, which is another screen. A wide area map for displaying the scroll point is displayed on, and the process proceeds to step S3.

When the two screens are not being displayed, the control circuit 2 judges "NO" in the step S2 and shifts to the step S12, in which the display screen is displayed as shown in FIG. 1 (b). For example, a small screen is divided and displayed on the upper right (divided screen forming means), a wide area map for displaying the scroll point position is displayed on the small screen, and the process proceeds to step S3. In the following, the screen on which the scrolled map is displayed (one screen) is called the scroll screen, and the screen of the wide area map for indicating the position of the map displayed on the scroll map screen is called the wide area map screen. I will call it.

In step S3, the control circuit 2 determines whether or not the scale of the map to be scrolled is a predetermined value or more (position display necessity determination means). When the scale of the scroll target map is less than the predetermined value, that is, when the scale value is so small that the scroll position is not required to be displayed (in the case of a wide area map), the control circuit 2 determines “NO” in step S3. Then, a normal scrolling process is performed in which the scroll position is not displayed on the display screen (steps S13 and S14: "NO" is repeated), and when the scroll operation ends ("YES" in step S14), the process ends.

The scale of the map to be scrolled is a predetermined value or more,
That is, if the map is a detailed map, the control circuit 2 executes step S
It is determined to be "YES" in 3, and then the process proceeds to step S4 (scale appropriateness determining means) for determining whether or not the scale of the wide area map displayed on the screen for displaying the scroll point, that is, the wide area map screen is appropriate. In this case, it is determined that the scale of the wide area map displayed on the wide area map screen is 1 / a predetermined value of the scale of the map to be scrolled, or 1/4 or less in this embodiment.

When the scale of the wide area map is appropriate, the control circuit 2 becomes "YES" in step S4, shifts to step S5, and starts the scroll operation. If the scale is not appropriate, the result is “NO” in step S4, the process proceeds to step S15, the scale of the wide area map is changed to be appropriate, and then the process proceeds to step S5 to perform the scrolling operation. Start.

When the scroll operation starts, the map on the display screen is moved (step S6), and when the movement amount reaches a predetermined amount ("YES" in step S7), the control circuit 2
Calculates the center position of the scrolled map in global coordinates (for example, longitude and latitude) (step S8). Then, the control circuit 2 converts the calculated global coordinates into in-screen coordinates of the wide area map screen (step S9), and displays the scroll position on the wide area map screen at point P in FIGS. 1 (a) and 1 (b). (Step S10).

After that, the control circuit 2 judges whether or not the scroll operation is completed ("N" in step S11).
"O"), if not completed, the process returns to step S6 to repeat the above operation. Then, when the scroll operation ends (“YES” in step S11), the control circuit 2
Ends the operation for displaying the scroll position and ends.

As described above, according to the present embodiment, when the map is scrolled, the position of the map currently displayed on the scroll screen is displayed on the scroll map screen, so that the user can see the current scroll screen. You can easily know where the map displayed in is. Further, in the present embodiment, when the left and right two screens of uniform size are being displayed at the start of scrolling, one of them is used as the screen for displaying the scroll position and the left and right two screens are not being displayed. In this case, since a small screen is created on the display screen and this is used as the screen for displaying the scroll position, the display range of the map suddenly becomes large or suddenly becomes small, and it feels uncomfortable. There is no possibility of causing problems in use.

Further, in this embodiment, when the map to be scrolled is a wide area map, normal scroll processing is performed without creating a screen for displaying the scroll position. Therefore, even if the scroll position is not displayed, Even in the case where the scroll position can be determined, it is possible to prevent the occurrence of the problem that the scroll map is made difficult to view by creating a wide area map screen.

The present invention is not limited to the embodiments described above and shown in the drawings, and the following expansions and modifications are possible. On the wide area map screen, the same range as the map range displayed on the scroll screen may be displayed in a rectangular shape. In this case, the positions of the four corners of the scroll screen may be calculated in global coordinates in step S7, and the coordinates may be converted into in-screen coordinates of the wide area map screen for display. The map may be moved vertically and horizontally (east-west north-south) or intermittently. INDUSTRIAL APPLICABILITY The present invention is not limited to car navigation devices, and can be widely applied to general map display devices such as when a map is displayed on a mobile terminal.

[Brief description of drawings]

FIG. 1 is a diagram showing a screen configuration for displaying a position of a scroll map according to an embodiment of the present invention.

FIG. 2 is a block diagram of an electrical configuration of a car navigation device.

FIG. 3 is a flowchart for displaying the position of a scroll map.

[Explanation of symbols]

1 is a car navigation device (map display device), 2 is a control circuit, 3 is a position detection device, 4 is a map data storage device,
6 is a display device

Continued front page    F-term (reference) 2C032 HB02 HB22 HB23 HB24 HB25                       HC08 HC15 HC22 HC24 HC25                       HC26 HC31 HD16 HD23                 2F029 AA02 AB01 AB07 AB09 AB13                       AC02 AC09 AC14 AC18 AC19                       AD01                 5B050 AA08 BA07 BA17 CA07 CA08                       EA19 EA24 FA02 FA10 FA12                       FA13                 5H180 AA01 BB02 BB04 BB05 BB13                       CC12 FF04 FF05 FF12 FF13                       FF22 FF25 FF27 FF33 FF35

Claims (2)

[Claims] 1. A map display device capable of displaying a map on a display screen based on map data and moving the range of the map by an operation, wherein the display screen is divided during a moving operation of the display range of the map. Of the divided screens, a map to be moved to one divided screen is displayed, and a wide area map including the range of the map to be displayed on the one divided screen is displayed on another divided screen. A map display device displaying the position of the map displayed on the one split screen. 2. The division of the display screen during the operation of moving the display range of the map is performed when the reduction scale of the map to which the display range is moved is determined and the reduction scale exceeds a certain value. The map display device according to claim 1, wherein: