JP3240708B2 - Map display device - Google Patents

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 capable of displaying a map on a screen such as a CRT, scrolling as necessary, and displaying a desired point on the map at a predetermined position on the screen. Things.

[0002]

2. Description of the Related Art A map display device has been developed which displays map information around a vehicle (own vehicle) mounted on the vehicle and shows the position of the vehicle to a driver or a passenger. Such a map display device is used as a part of a route guidance device that automatically searches for a route by setting the position of a vehicle and a destination point, performs guidance display according to the searched route, and performs route guidance. Often done.

An example of a map display device used for such route guidance is described in Japanese Patent Application Laid-Open No. 3-137885. In this device, the position of the host vehicle is normally displayed in the center of the screen, but the position of the host vehicle is shifted from the center of the screen as necessary, thereby displaying a map that could not fit on the screen. be able to. This method
The displayed map is sequentially scrolled by indicating which direction of the displayed map is located in the displayed map, and a desired map is displayed. More specifically, if the user wants to see a map in a direction further to the left of the currently displayed map, the displayed map is moved to the left by a predetermined amount by pressing a scroll key at the left end of the screen. It is configured as follows. Then, scrolling is repeated as long as the scroll key is kept pressed, and when a desired screen is displayed, when the finger is released from the key, the screen stops at that position.

[0004] In such an operation method, the driver must keep pressing a desired scroll key until a desired screen is displayed, and the operation time of a device mounted on a vehicle becomes long. was there. In such a device, it is desirable that the driver be operated with a simple operation in a short time so that the driver can operate in a short time such as when waiting for a traffic light, and the display can be instantly read.

[0005] From this point of view, there is also a map display device which designates a desired position on the map and changes the display so that this position is located at the center of the screen. In this device, a driver's operation can be obtained by instructing a position to be displayed at the center of the screen once on the display panel, so that the operation is simplified as compared with the above-described device.

[0006]

However, in the conventional apparatus, there is a problem that when the screen is changed, the display range of the screen changes greatly, so that the position of the host vehicle or the destination point is easily lost. In addition, the display range may be changed gradually so that the display range is not extremely changed, and control of repeating scrolling until the desired position is at the center of the screen can be performed. In this case, however, the map information is stored in the storage device. It takes a certain amount of time to read and display, so you cannot scroll continuously,
Discrete display will be repeated. Therefore, the above-mentioned problem that the position of the host vehicle or the like tends to be lost is a problem that has not been solved yet to some extent.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. In a map display device capable of changing a display range of a map and displaying a desired range of an operator, the present invention It is another object of the present invention to provide a display device that does not lose the position of the vehicle or the destination.

[0008]

Means for Solving the Problems] To achieve the foregoing objects, a vehicular navigation system according to the present invention, the target position setting means for setting a target position a position on the map is touched on the map display screen Mark display means for displaying a mark at the target position on a map, and scroll control means for scrolling the displayed map until the target position reaches a predetermined position on the screen while displaying the mark. It is characterized by having.

[0009]

The present invention has the above-described configuration, and sets a point to be located at the center of the screen as a target position, and displays a mark here to scroll the map to change the display range. Also at the time of performing, the direction and amount of scrolling can be determined by the mark, and the position of the host vehicle and the like is not lost.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments according to the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a vehicle map display device to which the present device is applied. A map information storage unit 10 for storing information such as roads, place names, building names, river names, and the like is provided so that the stored map information can be read out as needed. Also, a GPS receiver 14 using a satellite navigation system (hereinafter referred to as GPS) for measuring the current position of the vehicle, a direction sensor 16 for detecting the traveling direction of the vehicle based on geomagnetism, a steering angle of the steering wheel A steering sensor 18 for detecting a changed course and a distance sensor 20 for detecting a traveling distance based on the number of rotations of wheels are provided. Based on the detection results of these sensors, the current position measuring unit 12 determines the current position of the vehicle. Determine.

The arithmetic section 22 reads map information around the current position of the host vehicle from the map information storage means 10 and displays the map information on the display section 24 together with the current host vehicle position and traveling direction. The display unit 24 is provided in the instrument panel near the driver's seat.
Thus, information on the position of the own vehicle and the destination can be obtained. FIG. 2 shows an example of this display. In FIG. 2, the road is indicated by a solid line 102. The position of the host vehicle is indicated by a circle 104 and the traveling direction is indicated by a wedge-shaped arrow 106. The display of the road is not limited to the distinction based on the thickness of the line, but may be distinguished by changing the color.

A feature of the present apparatus is that the own vehicle position 104 normally displayed at the center of the screen can be moved by a predetermined operation. As a result, a map outside the range of the screen can be displayed, and the driver can derive map information to be confirmed as needed. For this purpose, a target position setting unit 26a is provided in an input unit 26 such as a display with a touch panel, which will be described later, whereby a point on the map to be positioned at the center of the screen after the display is changed is set. While displaying the mark, the map display is scrolled by the scroll control unit 22b.

The scroll operation will be described below. FIG. 3 is an explanatory diagram illustrating a switch configuration of the touch panel display device. On the display screen 26, an infrared beam runs vertically and horizontally parallel to this screen. That is, a light emitting unit that emits infrared light is arranged on one side, and a light receiving unit that receives this infrared light is provided on the other side. In the figure, this infrared beam has a vertical beam L
Lines indicated by 1 to 11 and horizontal beams are indicated by lines indicated by H1 to H9. The grid points of each line are represented as C in the figure.

When a finger touches the screen of the display with a touch panel having such a configuration, a beam passing through the touched position is cut off, and infrared rays are not detected by the light receiving section. Thus, the touched position is detected.
For example, when a grid point C1 shown in the drawing is touched, L1 and H
Infrared light of line 1 is no longer detected, thereby detecting that the position of the grid point C1 has been touched by a finger.

Next, the scroll operation will be described.
FIG. 4 is a view for explaining a scroll operation, and shows a state in which a map around the own vehicle is displayed on the above-described in-vehicle display, and the display has a touch panel shown in FIG. A display 26 is used. FIG. 5 is a flowchart of this operation.

First, the driver touches a panel surface in a desired direction to display a map of a range not appearing on the screen. In the case of FIG. 4A, the position 104 of the host vehicle is shown at a normal position, that is, at the center of the screen. After that, the driver turns right at the intersection 108 and proceeds in the upper right direction on the screen, and thus wants to obtain information in a further upper right direction that is not included in the screen range. At this time, the user touches the position 110 in the figure with a finger, and instructs scrolling of the map so that the upper right area can be seen (step S1). It is assumed that the designated position is the grid point C2 in FIG. As described above, the recognition at this position is recognized by the interruption of the infrared ray line. In this case, the infrared rays of the lines L11 and H2 are interrupted. The position touched by this finger is the target position, and thereafter, scroll control of the map is performed based on this position. Then, a cross mark (+) 112 as a mark is displayed at the lattice point as the target position (step S2).

Next, the distance between the target position and the center of the screen is calculated (step S3). The number of scrolls n is determined based on this distance (step S4). That is, when the target position and the center of the screen are not so far apart, the number of scrolls n is made smaller, and when they are farther apart, it is made larger. In this embodiment, instead of the actual distance between the target position and the center of the screen, the larger of the distance components in the L and H line directions is selected, and the number of lines between the target position and the center of the screen in that direction is determined. The number obtained by adding 1 is defined as the number of scrolls n described above. Referring to FIG. 3, the distance between the target position C2 and the center position C3 is longer in the H direction, and is represented here, and the number of scrolls n is five, which is obtained by adding 1 to the number 4 crossing the L line. Is set.

When this setting is completed, scrolling of the map is started in accordance with the number of times (step S5). FIG. 4C shows the first scrolled screen. In this figure, the initial target point, the center point, and the straight line connecting these points are indicated by dotted lines for convenience of explanation, but are not actually displayed. The mark 112 is shifted from the initial position toward the center, and the entire map is shifted accordingly. Then, a new road 110 is displayed on the map that has newly entered the screen range. Further, when the scroll is repeated and the target point moves to the center of the screen as shown in FIG.
2 is erased (step S6). Here, the scroll end point is set at the center of the screen, but it is also possible to set another predetermined position on the screen as the scroll end point.

As is clear from the above description, the operator only has to touch the edge of the screen when he wants to greatly shift the screen display range, and touches a position near the center of the screen when he needs only a slight movement. . Thus, the scroll amount can be specified. The operator first touched the screen
Scroll by moving the placemark displayed on the map location
The amount and direction of the can be confirmed. As described above, the operator once
The scroll amount and direction can be specified by the operation of
A desired image can be obtained by a simple operation. Also one
The direction and amount of scrolling can be seen with the eyes,
The burden can be reduced.

In the embodiment, the number of scrolls n
Is set based on the larger one of the L and H line directions, but it is also possible to set the actual distance on the screen as a reference. In addition, the number of times of scrolling is also set to “the number of lines crossed + 1”, but is not limited to this, and if there is room in the access time for reading from the storage device, the number of times can be further increased. is there.

[0021]

According to the present invention as described above, according to the present invention, while displaying the position on the first indicated map as a landmark, by performing the scan black <br/> Lumpur, the vehicle on the map Never lose track of the location or destination .

[0022]

[Brief description of the drawings]

FIG. 1 is a configuration block diagram of a preferred embodiment according to the present invention.

FIG. 2 is a diagram illustrating a display example of the apparatus according to the present embodiment.

FIG. 3 is a diagram illustrating a display with a touch panel of the device of the present embodiment.

FIG. 4 is a diagram for explaining a scroll operation in the device of the present embodiment.

FIG. 5 is a diagram illustrating a flowchart of a scroll operation in the apparatus of the present embodiment.

[Explanation of symbols]

 10 Map information storage unit 22a Mark display unit 22b Scroll control unit 26 Input unit 26a Target position setting unit

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-62-288516 (JP, A) JP-A-4-98287 (JP, A) JP-A-6-4025 (JP, A) JP-A-3-3 174182 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G09B 29/10 G01C 21/00 G08G 1/0969

Claims (1)

(57) [Claims] 1. A map display apparatus for displaying on a screen of the display means a portion of the stored map in the storage means, the target position setting means for setting a target position a position on the map of Kiga surface before touched having the a mark display means for displaying a mark in front Symbol target position, and a scroll control means for scrolling the map displayed up to the predetermined position on the target position while keeping displaying the landmarks the screen A map display device, characterized in that: