JPH10198271A - Map drawing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the map drawing device which can contribute to the improvement of operability. SOLUTION: Map data is displayed on the screen of a display part 21 and a screen touch panel part 23 arranged on this screen is used to input position data on a touch while making it correspond to a position on the screen. On basis of successively inputted position data, a system control part 7 detects the moving direction of the contact position and a display control part 17 scrolls and displays the displayed map data in the moving direction or reverse direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a map drawing device applicable to a vehicle navigation device, and more particularly to a map drawing device that can contribute to an improvement in operability during scroll processing.

[0002]

2. Description of the Related Art Conventionally, as a map drawing device for displaying map information, a navigation device described in Japanese Patent Application Laid-Open No. 6-4025 is known. In this device, a screen touch switch having eight types of directions set in advance is mounted on a display device, and, for example, when an operator touches one of the screen touch switches with a fingertip, the designated direction and Has the advantage that the map can be scrolled in the reverse direction, and as a result, the map information that has not been seen so far can be scrolled and displayed.

[0003]

However, in the conventional map drawing apparatus, when the map information is to be displayed by scrolling, the directions of the map information that the operator wants to see can be set in eight kinds of preset map information. I had to select from among the screen touch switches, aim at the switch, and touch it with my fingertips. For this reason, there has been a problem that the operator is forced to judge the map information and perform a complicated switch operation.

If the direction of the map information that the operator wants to view is not among the eight types of preset screen touch switches, the scroll direction is specified at least twice to specify the map direction to be viewed. We had to scroll to the information. For this reason, there is a problem that the operation becomes complicated and trial and error is forced. The present invention has been made in view of the above, and an object of the present invention is to provide a map drawing device that can contribute to improvement of operability.

[0005]

According to the first aspect of the present invention,
In order to solve the above problems, map information display means for displaying map information on a screen, and position information input means arranged on the screen and inputting position information when there is a contact in association with a position on the screen Moving direction detecting means for detecting a moving direction of a position due to the contact based on continuously input position information; and a map displayed in a forward direction or a reverse direction with respect to the detected moving direction. The gist is to have a map information drawing means for scrolling information.

According to a second aspect of the present invention, in order to solve the above-mentioned problem, the map information drawing device includes a moving speed detecting means for detecting a moving speed of a position due to the contact based on the input position information. Means is that the scroll amount of the displayed map information is changed according to the detected moving speed.

According to a third aspect of the present invention, in order to solve the above-mentioned problem, the map information drawing means reduces the displayed map information by a predetermined amount when the movement direction is detected by the movement direction detection means. The point is to scroll.

[0008]

According to the first aspect of the present invention, map information is displayed on a screen, is arranged on the screen, and position information when there is a contact is associated with a position on the screen. To enter. Here, based on the continuously input position information, the direction of movement of the position due to the contact is detected,
By scrolling the displayed map information in the forward or reverse direction with respect to the moving direction, it is possible to scroll in any direction, thereby contributing to improvement in operability.

According to the second aspect of the present invention, the moving speed of the position due to the contact is detected based on the input position information, so that the position is displayed according to the detected moving speed. Since the scroll amount of the map information is changed, the scroll amount can be adjusted,
This can contribute to improved operability.

According to the third aspect of the present invention, when the moving direction is detected, the displayed map information is scrolled by a predetermined amount, whereby the scroll amount can be fixed. As a result, significant scrolling can be prevented, which can contribute to improvement in operability.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. (First Embodiment) FIG. 1 is a diagram showing a system configuration of a vehicle navigation device 1 on which a map drawing device according to a first embodiment of the present invention is mounted. In the figure, GPS (Global Positioning System)
The receiver 5 is a receiver for measuring a current position represented by latitude and longitude and an azimuth based on a radio wave from a satellite received via the antenna 3, and is measured by the GPS receiver 5. The current position data is provided to the system control unit 7.

The system control section 7 has a timer for measuring a time interval, and controls the entire apparatus according to a predetermined control program stored in the ROM section 9. ROM section 9
An execution program and control data corresponding to the navigation function are stored. The vehicle speed sensor 11 detects a traveling speed of the vehicle by generating a pulse signal corresponding to the number of revolutions of the mission by a rotary encoder provided in the mission. The azimuth sensor 13 detects an azimuth by incorporating a geomagnetic sensor or a gyroscope.

The CD-ROM drive 15 is a CD-RO drive.
M has a drive mechanism for driving M, and the latitude and longitude recorded on a CD-ROM or a format similar thereto (hereinafter, referred to as
It is a device that drives and reads map data representing a position using map coordinates. The map data recorded in the CD-ROM drive 15 is sent to the system controller 7 using a transmission method such as serial communication or parallel communication. The display control unit 17 exchanges image data between the system control unit 7 and the VRAM unit 19, draws image data, stores the image data in the VRAM unit 19, and
The image data stored in the RAM unit 19 is read out at the display rate and displayed on the display unit 21. VRAM (Video Rand
The om Access Memory) unit 19 develops and stores map data and guidance data that can be displayed on the display unit 21. Display 2
1 has a liquid crystal display panel and the like, and displays the display data created by the display control unit 17.

The screen touch panel unit 23 is a touch panel arranged on the screen of the display unit 21 and is a device for inputting position data when there is a contact in association with a position on the screen. The screen touch panel unit 23 inputs the touch of the fingertip by the operator as position data using a well-known electronic, electrostatic, or optical system. In addition, by displaying operation guide information on the display unit 21 and touching a desired part on the screen touch panel unit 23, for example, departure point data and destination data necessary for a route search are input.

Next, referring to FIGS. 3 and 4, the vehicle navigation system 1 will be described based on the flowchart shown in FIG.
Will be described. The system control section 7 is repeatedly executed at predetermined intervals (for example, 10 ms) in accordance with the following control program stored in the ROM section 9. The system control unit 7 reads menu screen data for setting a destination from the ROM unit 9 in advance, stores the menu screen data in the VRAM unit 19 via the display control unit 17, and reads the menu screen data from the VRAM unit 19 via the display control unit 17. It is assumed that the menu screen data is read at the display rate and displayed on the display unit 21. The display unit 21 displays, as a menu screen, touch switch images such as a destination setting switch, a guidance information switch, and a navigation mode switch.

First, in step S10, when the operator touches the destination setting switch displayed on the screen with a fingertip from the screen touch panel section 23, the position data is transmitted to the system control section 7 via the screen touch panel section 23. Is entered. The system control unit 7 determines that the position data is within the range of the destination setting switch, reads the destination setting operation screen data for setting the destination from the ROM unit 9, and reads the display control unit 17 The destination setting operation screen data is read out from the VRAM unit 19 at the display rate via the display control unit 17 and displayed on the display unit 21 via the display control unit 17. As described above, the destination data is input to the system control unit 7 while sequentially operating the pop-up menu. Note that the selection method using the pop-up menu is not directly related to the present invention, and thus the description thereof is omitted.

In step S20, first, the current position data detected by the GPS receiver 5 is taken into the system control unit 7. Next, the destination data specified by the operator via the screen touch panel unit 23 and the current position data detected by the GPS receiver 5 are associated with each other and recorded on a CD-ROM based on the well-known Dijkstra method or the like. A search is made for nodes and road links that are present to create route data for a recommended travel route.

In step S30, the system control unit 7
Expands and stores the route data in the VRAM unit 19 via the display control unit 17. Next, map data corresponding to the created wide area map capable of displaying all routes to the destination is stored in the CD-ROM via the CD-ROM drive device 15.
From the VRAM unit 19 via the display control unit 17.
To develop wide-area map data. Next, the system control unit 7
The control unit 17 superimposes the route data on the map data stored in the VRAM unit 19 via the display control unit 17, reads out the route data at the display rate, and displays the recommended route on the display unit 23. Thus, the wide area map from the current position P to the destination D shown in FIG.

Next, in step S40, it is determined whether or not the navigation mode switch, which is displayed in advance as a pop-up menu, is operated, and the position data is input to the system control unit 7 through the screen touch panel unit 23. Here, if the navigation mode switch has been operated, the process proceeds to step S50, while if the switch has not been operated, the process returns to step S10. In step S50, the current position data detected by the GPS receiver 5 is taken into the system control unit 7.

Next, in step S60, the system control section 7 reads out map data corresponding to the narrow area map around the current position P from the CD-ROM via the CD-ROM drive 15, and the display control section 17 The wide area map data is developed in the VRAM unit 19 via the VRAM unit 19. Next, the route data is superimposed on the map data stored in the VRAM unit 19 via the display control unit 17 and read at a display rate, and the recommended route is displayed on the display unit 23. In this way, the narrow area map (a) around the current position P shown in FIG.

In step S70, it is determined whether or not the operator has touched the screen touch panel unit 23. If there is a touch on the screen touch panel unit 23, the process proceeds to step S80, whereas if there is no touch, the process proceeds to step S50.
Return to Thus, when returning to step S50,
The current position is sequentially updated in accordance with the traveling of the vehicle, and as a result, the displayed narrow-area map and the position of the vehicle mark M are updated. In step S80, since the operator has touched the screen touch panel unit 23, the moving direction of the touched position is detected.

Here, a method for detecting the moving direction of the contact position will be described with reference to FIG. Note that an optical touch panel is used for the screen touch panel section 23 shown in FIG. First, on the screen touch panel section 23, m photodiodes (not shown) are arranged above the screen, and n photodiodes (not shown) are arranged on the left side of the screen. Are illuminated vertically.
On the other hand, m phototransistors (not shown) are arranged at the bottom of the screen, and n phototransistors (not shown) are arranged at the right side of the screen, and are configured to respectively receive a plurality of detection beams vertically emitted from the opposite surface. Have been.

When the screen touch panel unit 23 having such a configuration is used, the position in the X direction with respect to the screen is (X1, X2,..., Xm). , Y2,..., Ym) can be detected.

For example, as shown in FIG. 4, when the operator's fingertip touches the contact point P1 of the screen touch panel 23 and moves sequentially and is separated at the contact point P2, the signal is output first. The position data is (X1, Y3), the next output position data is (X2, Y2), and the last output position data is (X3, Y1). Therefore, the line segment P1P2 representing the moving direction of the fingertip
The slope M is represented by the following equation: M = (Y3-Y1) / (X1-X3).

Next, in step S90, the VRAM unit 1
9 with respect to the map data stored in step S8.
When the display position is scrolled and displayed in the movement direction detected at 0, whether or not the map data stored in the VRAM unit 19 needs to be updated in order to avoid displaying the end of the VRAM unit 19 Judge. If the map data needs to be updated, the process proceeds to step S100, and if not, the process proceeds to step S110. In step S100,
Since the map data stored in the VRAM unit 19 needs to be updated, the map data around the position corresponding to the detected moving direction is stored in the CD-R drive via the CD-ROM drive 15.
The data is read from the OM, and the narrow area map data is developed in the VRAM unit 19 via the display control unit 17.

Next, in step S110, the system control unit 7 scrolls the display position of the map data stored in the VRAM unit 19 via the display control unit 17 until the display position reaches a predetermined amount, and draws the map data. As a result, the display unit 2
3 is subjected to scroll processing in the forward direction with respect to the moving direction. In this way, as shown in FIG. 5, the display screen (a) displaying the vehicle mark M is:
Display screen that is scrolled sequentially in the moving direction (b)
Is displayed.

Next, in step S120, it is determined whether or not the navigation mode switch, which is displayed in advance as a pop-up menu, is operated, and the position data is input to the system control unit 7 through the screen touch panel unit 23. Here, if the navigation mode switch has been operated, the process proceeds to step S50, while if the switch has not been operated, the process proceeds to step S13.
Go to 0.

In step S130, it is determined whether or not the operator has touched the screen touch panel unit 23. If there is a touch on the screen touch panel unit 23, step S80
On the other hand, if there is no such contact, step S1
Return to 30. In the present embodiment, a case has been described in which the direction of the scroll processing is set to the forward direction with respect to the moving direction of the contact position. However, the present invention is not limited to such a case. The direction of the scroll processing may be set to the opposite direction to the moving direction.

As described above, the map data is displayed on the screen of the display unit 21, and the position data when there is a contact is corresponded to the position on the screen from the screen touch panel unit 23 arranged on this screen. And enter it. Here, the moving direction of the contact position is detected by the system control unit 7 based on the continuously input position data, and the map data displayed in the forward or reverse direction with respect to the moving direction is detected. By drawing by the display control unit 17 so as to scroll, it is possible to scroll in an arbitrary direction, which can contribute to improvement in operability.

As described above, when the moving direction is detected, the scroll amount can be fixed by scrolling the map data displayed on the display unit 21 by a predetermined amount. This can prevent unnecessary scrolling and contribute to improvement of operability.

(Second Embodiment) It is assumed that a map drawing device according to a second embodiment of the present invention is mounted on a vehicle navigation device 1 shown in FIG. Here, the operation of the vehicle navigation device 1 will be described based on the flowchart shown in FIG. In the present embodiment,
The flowchart shown in FIG. 2 is different from the flowchart shown in FIG. 2 in that step S85 is newly added and step S110 is changed.

In step S85, after detecting the moving direction of the contact position, the moving speed of the contact position is detected. Here, a method of detecting the moving speed of the contact position will be described with reference to FIG. For example, as shown in FIG. 4, when the fingertip of the operator moves sequentially after touching the contact point P1 of the screen touch panel unit 23 and is separated at the contact point P2, the position data output first is: (X1, Y3), and the last output position data is (X3, Y1).

Therefore, the length L of the line segment P1P2 is

(Equation 1) Becomes Here, using a timer in the system control unit 7, the time (t1) at which the position (X1, Y3) is reached after touching the contact point P1 and the position (X
(3, Y1) is measured at time t2. Next, when the required time T from the time t1 to the time t2 is obtained, T = t2−t1. Therefore, the moving speed V of the contact position is V = L / T.

Next, according to the detected moving speed V, the scroll amount D of the displayed map data is set as D = kV (k = constant). However, if the scroll amount D is greater than or equal to the reference amount Dref, and D ≧ Dref, the limit value of the scroll amount is set as D = Dref. Note that a display pixel may be used as a basic unit of the scroll amount.

In step S110 shown in FIG.
Although the display position of the map data stored in the VRAM unit 19 is sequentially scrolled and drawn until a predetermined amount is reached via the display control unit 17, in the present embodiment, the scroll amount is moved. It changes according to the speed V. As a result, scroll processing is performed on the display screen of the display unit 23 in the moving direction by a scroll amount corresponding to the moving speed of the contact position.

In this way, as shown in FIG. 7, the display screen (a) on which the vehicle mark M is displayed is sequentially scrolled in the moving direction, and the display screen (c) and the display screen (d) are displayed. ), A screen corresponding to the scroll amount such as a display screen (b) is displayed. As described above, by detecting the moving speed of the position due to the contact based on the input position data by the system control unit 7, the scroll amount of the displayed map data is changed according to the detected moving speed. Therefore, the scroll amount can be changed according to the degree of the operation, which can contribute to improvement in operability.

In the above embodiment, the case where an optical screen touch panel that emits a detection beam is used for the screen touch panel unit 23 has been described. However, the present invention is not limited to such a case, and an electronic type touch panel is used. Similarly, in the case of using the electrostatic type, the touch of the fingertip by the operator can be input as position data.

[Brief description of the drawings]

FIG. 1 is a diagram showing a system configuration of a vehicle navigation device 1 on which a map drawing device according to a first embodiment of the present invention is mounted.

FIG. 2 is a flowchart for explaining an operation of the vehicle navigation device 1 equipped with the map drawing device according to the first embodiment.

FIG. 3 is a diagram when a wide area map is displayed.

FIG. 4 is a diagram for explaining a configuration of a screen touch panel unit 23;

FIG. 5 is a diagram showing a display screen (b) after a scroll process.

FIG. 6 is a flowchart for explaining the operation of the vehicle navigation device 1 equipped with the map drawing device according to the second embodiment.

FIG. 7 is a display screen after the scroll processing (c),
It is a figure which shows (d) and (b).

[Explanation of symbols]

 7 system control unit 17 display control unit 21 display unit 23 screen touch panel unit

Claims (3)

[Claims] 1. Map information display means for displaying map information on a screen, position information input means arranged on the screen and inputting position information when there is a contact in association with a position on the screen, Moving direction detecting means for detecting the moving direction of the position due to the contact based on the continuously input position information; and displaying the map information displayed in the forward or reverse direction with respect to the detected moving direction. A map drawing device comprising: a scrolling map information drawing means. 2. A moving speed detecting means for detecting a moving speed of a position due to the contact based on the inputted position information, wherein the map information drawing means displays the moving image in accordance with the detected moving speed. 2. The map drawing device according to claim 1, wherein a scroll amount of the map information is changed. 3. The map according to claim 1, wherein the map information drawing means scrolls the displayed map information by a predetermined amount when the moving direction is detected by the moving direction detecting means. Drawing device.