JPS61234422A - Coordinate inputting device - Google Patents

Abstract

PURPOSE:To prevent mis-input due to paralax by applying correcting operation to a detected coordinate depending on the position of an eye based on the content of a storage circuit storing a reference coordinate in outputting a coordinate by an input panel. CONSTITUTION:The input panel 2 formed with a single resistance film is provided on a display device 1 displaying items. In applying command and operation to the panel 2 to detect a coordinate to a point of the device 1 by a detection circuit 3, the detected value is inputted to an arithmetic circuit 4. A reference coordinate storage circuit 11 storing a commanded point of the panel 2 to the reference coordinate of the device 1 is provided, the reference coordinate stored in the circuit 11 is used, the circuit 4 applied correcting operation to the command point by the commanding operation of the panel 2 detected by the circuit 3 and the resulting coordinate data is sent to a computer 5. The computer 5 uses the corrected coordinate data to correct the paralax between the device 1 and the panel 2 and displays the result to the device 1.

Description

[Detailed Description of the Invention] [Summary] A coordinate input device in which an input panel is provided on a display device, and coordinates for the indicated point on the display device are output by operating instructions on the input panel, and the reference point of the display device is A memory circuit is provided for storing the indicated point on the input panel with respect to the coordinates, and when the input panel is operated, the corresponding point on the display device for the indicated operation point is determined using the reference coordinates stored in the memory circuit. correction is performed on the instruction point detected by the instruction operation to eliminate parallax between the display device and the input panel.

[Industrial application field]

The present invention relates to a coordinate detection device, and more specifically, to a transparent coordinate input panel installed over a display device and a device for correcting the origin of a display area in the display device.

When installing a transparent coordinate detection panel on a coordinate device, it is necessary to match each coordinate area. However, in a touch input panel using a resistive sheet, the size, position, etc. of the coordinate area is not constant in each panel due to parallax etc. Also, the size, position, etc. of the display coordinate area of a display device is not constant, such as in a CRT. For this reason, it is difficult to match each coordinate area even if the coordinate areas are the same, and it is impossible if the areas have different sizes.

For this reason, it is desired to make the size and position of the coordinate area of the coordinate detection device and the display coordinate area of the display device uniform.

[Conventional technology]

A conventional coordinate input device is shown in the block diagram of FIG.

In FIG. 4, reference numeral 1 indicates a display device, 2 a human cover panel made of a single resistive film, 3 a detection circuit, 4 a control circuit, and 5 a host computer. In the circuit of Fig. 4,
In order to detect the coordinates on the display device 1, a corresponding point on the input panel 2 is operated (touched), the coordinates of that point are detected by the detection circuit 3, and the detected coordinates are sent to the control circuit. The coordinates are transformed by , and the coordinate data is sent to the computer 5. The computer 5 then sends the display data to the display device 1.

[Problem that the invention seeks to solve]

In the conventional apparatus shown in FIG. 4, erroneous inputs often occur due to parallax caused by the gap between the display device and the input panel mounted on the display surface.

FIG. 5 shows the phenomenon of erroneous input due to this parallax.

In FIG. 5, 6 is the display surface of the surface device, 7 is a display area, 8a to 8b are corresponding display areas on the input panel 2 according to the eye position 8, and 9a to 9b are the input panel 2 according to the eye position 29.
This is the corresponding display area above. As shown in FIG. 5, the size and position of corresponding areas on the input panel for the same display area differ depending on the parallax.

The present invention was created in view of these points, and an object of the present invention is to provide a coordinate input device that eliminates parallax with a simple configuration.

[Means for solving the invention]

FIG. 1 is a block diagram of the principle of the coordinate input device of the present invention.

In FIG. 1, as in □ in FIG. 4, 1 is a display device, 2 is an input panel made of a single resistive film, 3 is a detection circuit, 4 is an arithmetic circuit, and 5 is a host computer. The feature of the present invention is that it includes a reference coordinate storage circuit 11.

Next, the memory circuit 11 will be explained with reference to FIG. In FIG. 2, the detected coordinates 0'-1' on the input panel 2 normally correspond to the front screen 0-1, but depending on the eye position, it becomes 0"-1#. Therefore, at the eye position, If 0''-1'' can be made to correspond to O-1, parallax caused by the position of the eye will no longer occur. Here, 0''-1# is determined as follows.

First, a message is sent to O'-1' to perform an instruction operation, and the detected coordinates when 0# is instructed and the detected coordinates when 1'' is instructed are stored in the storage circuit 11 as reference coordinates.

When outputting the designated coordinates, a correction calculation is performed using the stored reference coordinates as a reference, and the result is output. Note that if the position of the eyes changes, repeat the above operation.

[For production]

According to the present invention, when coordinates are output from the input panel, correction calculations are performed based on the position of the eye based on the detected coordinates based on the contents of the storage circuit, thereby making it possible to prevent erroneous input due to parallax.

〔Example〕

FIG. 3 shows an embodiment of the invention.

In Fig. 3, normally the input coordinate area corresponding to display areas 0 to 1 is O' to 1', but at the eye position as shown in the figure, even if you intend to specify the coordinate area 0 to 1, the input coordinate area is O' to 1'. In the panel, X, to x3 are detected as coordinate areas, so a correction calculation is performed in the following procedure.

, (a) "0", "0.5",' on display area 7
1", and when the message is executed, the corresponding detected coordinates xl+xt+x3 on the input panel 2 are stored in the storage circuit.

(b) Next, the operator touches a desired point X on the display area 7. At this time, the operator touches point ■ on the input panel with the intention of instructing X, but in this case the coordinates of point 0 are y
It is.

(c) Therefore, the following correction calculation is performed.

(i) When x=≦y≦x3 X3-x.

(ii) The coordinate data subjected to the correction calculations such as x+≦y<x2 Xt-X is sent to the computer 5, and the computer 5 performs conventional processing.

〔Effect of the invention〕

As described above, according to the present invention, erroneous input due to parallax can be prevented with an extremely simple circuit configuration, and therefore it is extremely useful in practice.

[Brief explanation of drawings]

Fig. 1 is a principle block diagram of the coordinate input device of the present invention, Fig. 2 is an explanatory diagram of the principle of the present invention, Fig. 3 is an explanatory diagram showing an embodiment of the present invention, and Fig. 4 is a diagram of the conventional coordinate input device. 1 and 4, 1 is a display device, 2 is an input panel, 3 is a detection circuit, 4 is an arithmetic circuit, 5 is a computer, 11 is a reference block diagram, and FIG. 5 is an explanatory diagram of a conventional device. This is a coordinate memory circuit. Figure 1: Block diagram of the principle of the present invention Figure 2: Diagram explaining the principle of the present invention Figure 3: Detailed diagram explaining the present invention

Claims (1)

[Scope of Claims] An input panel provided with a single resistive film is provided on a display device that displays items, and a detection circuit that detects the instruction operation of the input panel and coordinate values, and converts and outputs the coordinate values. A coordinate input device comprising an arithmetic circuit, further comprising a memory circuit for storing an indicated point on the input panel with respect to a reference coordinate of the display device, and when the input panel is operated with an instruction, the display device responds to the indicated operation point. A coordinate system characterized in that a point indicated by the pointing operation detected using reference coordinates stored in the storage circuit is corrected to eliminate parallax between the display device and the input panel. input device.