JPH01213685A - Map scroll plotter - Google Patents

Abstract

PURPOSE:To scroll in an optional direction by means of simple operation using the small number of keys to plot an image by scrolling and plotting a map in a moving direction in accordance with the movement of an indication pointer on a display screen. CONSTITUTION:A transparent touch sensor 17 for detecting a specified point on the display screen 16 is superposed on the display screen 16, a mode is set up to a map scroll mode by a scroll key SKY, an optional point on the display screen 16 is specified with a finger or the like, and the finger is moved to displace the indicated point. Thus, the movement of the indication point on the display screen 16 is detected by the transparent touch sensor 17 and inputted to a display processor 13. The processor 13 shifts a reading position of a map image from an image memory 14 every time when the moving distance of the indication point exceeds a set distance by each axial displacement. Thus a map range to be plotted can be displaced.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a map scroll drawing device, and particularly to a map scroll drawing device suitable for application to an automobile navigation system.

<Prior art> An automobile navigation system stores map information in a large-capacity storage device such as a CD-ROM, and is equipped with a position measuring device and a display device to measure the current position of the vehicle, and displays the information by key operation. Inputting a map index, reading the map information from the CD-ROM, drawing the map on the display screen, drawing a current position marker indicating the current position of the vehicle on the map, and moving the marker according to the movement of the vehicle. Move around the map.

Such a navigation system is provided with keys for continuously moving (scrolling) a map horizontally and vertically on a disk screen, and by operating a predetermined key, a map of a predetermined range can be drawn on the display screen. There is.

<Problem to be solved by the invention> However, in conventional map scrolling devices, left, right, top,
There was a problem in that the lower four scroll keys were required and it was not possible to scroll diagonally with a single operation.

From the above, an object of the present invention is to provide a map scroll drawing device that can scroll and draw a map in any direction using a small number of keys and with simple operations.

Means for Solving the Problems> FIG. 1 is a block diagram of a map scroll drawing device according to the present invention.

13 is a disk processor, 14 is a video RAM 116
is the display screen, 17 is the transparent touch sensor, SKY
is the map scroll key.

Function> A transparent touch sensor 17 for detecting the designated point on the display screen 16 is provided over the display screen, the scroll key SKY is used to set the map space mode, and then the user can touch any point on the display screen 16 using a finger or the like. Indicate a point and move your finger to displace the indicated point.

Such movement of the pointing point on the display screen is detected by the transparent touch sensor 17 and input to the display processor 13. Using the signal from the touch sensor, the display processor 13 shifts the position from which the map image is read from the image memory 14 by the displacement of each axis each time the amount of movement of the designated point exceeds a set distance, thereby displacing the map range to be drawn. .

<Embodiment> FIG. 1 is a block diagram of a map scroll drawing device according to the present invention.

11 is a CD-ROM for storing map images; 12 is an operation unit equipped with a map scroll key SKY, a numeric keypad TK, etc.;
13 is a display processor; 14 is a video RAM that stores a wide range of map images; 15 is a readout control unit;
6 is a display screen composed of a liquid crystal, a cathode ray tube, etc., and 17 is a transparent touch sensor (transparent touch tablet, transparent touch panel, etc.) which is placed over the display screen and detects a designated point on the display screen.

When you input the index of the map you want to display using keys such as a numeric keypad, the display processor 13
- Read a map image corresponding to the index from the ROM II and store it in the video RAM (image memory) 14.

Note that the video RAMI 4 stores a map image (for example, 4×4 times) of a much larger area than the display screen.

At the initial stage when the map image is stored in the video RAM 14,
The readout control unit 16 reads one screen worth of map information (see the dotted line in FIG. 1) from the center of the video RAM 14, outputs it, and displays it on the display screen 16. Therefore, the map image reading position is A, and this position As becomes the reading start address.

Although not shown, a marker indicating the current position of the vehicle is also drawn.

In this state, if it is desired to change the range of the map to be drawn by scrolling, the user selects the map scroll mode by pressing the scroll key SKY.

Thereafter, point Ps (see FIG. 2) on the display screen 16 is indicated, and the finger is moved to displace the indicated point.

This movement of the instruction point on the display screen is detected by the transparent touch sensor 17 and input to the display processor 13.

The display processor 13 uses signals from the touch sensor to draw a map image every time the amount of movement of the designated point exceeds a set distance Ds.

The readout start address As of the image memory 14 is updated so as to move in the specified direction, and the readout start address is input to the readout control unit 15. As a result, the map image of the area surrounded by the dotted line in FIG. 2 is drawn on the display screen 16, and thereafter the map area drawn changes every time the distance 1aDS is exceeded, and the map is scrolled in the direction of movement of the designated point.

Incidentally, in FIG. 2, MAP is a map image stored in the video RAM 14, and is shown superimposed on the display screen for convenience of explanation.

<Effects of the Invention> According to the present invention, a transparent touch sensor that detects an instructed point on a display screen is placed over the display screen, and the direction of movement is adjusted according to the movement of the instructed point on the display screen. Since the map is scroll-drawn, the map can be scrolled and drawn in any direction with a few keys and simple operations.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a map scroll drawing device according to the present invention, and the second section is an explanatory diagram of the scroll of the present invention. 13...Display processor, 14...Video RAM. 16...Display screen, 17...Transparent touch panel, SKY...Map scroll key,

Claims (3)

[Claims] (1) A map scroll drawing device that scrolls and displays a map drawn on a display screen, which includes a transparent touch sensor that is placed over the display screen and detects the designated point on the display screen, and a wide range of map images. and a display control means for determining the amount of displacement of each axis due to movement of an instruction point on a display screen and displacing the range of the map to be drawn on the display screen by the amount of displacement. Device. (2) The map scroll drawing device according to claim 1, wherein the display control means displaces the range of the map to be drawn by shifting the position from which the map image is read from the image memory by the displacement. (3) The map scroll drawing device according to claim 1 or 2, wherein the display control means displaces the map drawing range every time the amount of movement of the designated point exceeds a set distance.