JPH0259920A - Touch screen input device - Google Patents

Abstract

PURPOSE:To attain accurate input operation by allowing a position converting part to convert a position touched on a touch screen into a position on a display screen based upon its relative relation. CONSTITUTION:When a reference positioning mode is selected by a reference positioning instructing part 12, touch images are displayed on reference positions A, B of the display screen 1 of a display device 11. When the touch images are touched, the position (coordinate) data are detected by the touch screen 2 and averaged by a conversion factor computing part 14 and relative relation between a position on the display screen and a position on the touch screen 2 is determined, and the data are stored in the position converting part 15. Thereafter, the coordinate data are transferred to the converting part 15 by touching a position on the touch screen 2 and converted into the position on the display screen by using the relative relation determined by the computing part 14. Consequently, low operability can be improved and accurate touch screen input operation can be attained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention (Field of Industrial Application)] The present invention relates to a touch screen input device for a display device using a CRT, a liquid crystal panel, or the like.

(Prior Art) Conventionally, a touch screen has been attached to the front of the display screen of a display device using a CRT or liquid crystal panel, etc., and instead of operating switches or a keyboard, pictures of switches, etc. are displayed on the display screen. As a touch screen input device for inputting data by direct touch (hereinafter referred to as "touch"), the one shown in FIG. 3 is known.

This FIG. 3 uses an infrared type touch screen, and inside the frame 3 of the touch screen 2 attached to the front of the display screen 1, there are light emitting element groups 4a, 4a,
... and the light receiving element groups 4b, 4b.

. . . are arranged opposite to each other on the left and right and above and below, and the infrared beams 5 are run in a grid pattern vertically and horizontally.

Therefore, when the display screen 1 is touched with a finger or the like, the infrared beam 5 is blocked, and the touch screen 2 detects the position of the blocked beam in the horizontal and vertical directions (hereinafter expressed as coordinates). The relative relationship between the position on the display screen 1 and the position on the touch screen 2 is determined in advance, and it is possible to know which position on the display screen 1 has been touched from the detected coordinates based on the relative relationship. .

(Problem to be Solved by the Invention) However, in such a conventional touch screen input device, as shown in FIG.
This creates a parallax between the display screen 1 and the touch screen 2 in front of it, and even if the operator touches the touch image displayed on the screen 1, the touch screen 2 may appear at a position shifted from the image. The infrared beam will be blocked,
There is a problem in that erroneous operations may occur.

In addition, the position on the display screen 1 and the touch screen 2 may vary due to aging of the display device, installation conditions, and product variations.
A deviation may occur in the relative relationship between the upper positions, which also becomes a factor that impairs operability.

The present invention has been made to solve the above problems,
Touch screen input eliminates poor operability caused by the distance between the detection position and the display position, and also enables accurate input operations by correcting the relative relationship between the position on the display screen and the position on the touch screen. The purpose is to provide equipment.

[Structure of the Invention (Means for Solving the Problems) The touch screen input device of the present invention includes a display device using a CRT or a liquid crystal panel, etc., and a touch screen that corresponds to the position when the display screen of the display device is touched. A touch screen that generates a signal, a reference alignment instruction section that instructs multiple positions to be touched on the display screen in the reference alignment mode, and input of the correspondence between the positions on the display screen and the positions on the touch screen. A reference position input section, a conversion coefficient calculation section that averages the input results of this reference position and determines the relative relationship between the position on the display screen and the position on the touch screen, and and a position conversion unit that converts the touched position to a position on the display screen based on the relative relationship.

(Function) In the touch screen input device of the present invention, by selecting the reference alignment mode, a touch image is displayed at a reference position on the display screen to prompt the operator to touch, and when the operator is touched, The correspondence between the position on the display screen and the position on the touch screen is input, and the input results of this reference position are averaged in the conversion coefficient calculating section to determine the relative relationship between the position on the display screen and the position on the touch screen. .

Then, in a mode other than the reference alignment mode, the position conversion unit converts the position touched on the touch screen to a position on the display screen based on the relative relationship.

Therefore, if there is a deviation in the relative relationship between the position on the display screen and the position on the touch screen, by selecting the reference alignment mode, you can correct the relative relationship between the position on the display screen and the position on the touch screen. can be determined at any time, and after that operation, touch screen input operations can be performed with extreme precision.

(Example) Hereinafter, embodiments of the present invention will be explained in detail with reference to the drawings.

FIG. 1 shows the configuration of an embodiment of the touch screen input device of the present invention, and FIG. 2 is an explanatory diagram showing the relative relationship between the position on the display screen and the position on the touch screen.

As shown in FIG.
A touch screen 2 having a configuration similar to that of the conventional example shown in the figure, a display device 11 such as a CRT or a liquid crystal panel (this display device 11 includes a display screen 1), and a reference for instructing a reference alignment mode. A position alignment instruction section 12, a reference position input section 13 that is incorporated in a microprocessor in advance and performs predetermined calculation processing, a conversion coefficient calculation section 14, a position conversion section 15, and a touch data processing device 16 on the host computer side. It consists of

In this touch screen input device, first, when a deviation occurs in the relative relationship between the position on the display screen 1 and the position on the touch screen 2, the reference position alignment instruction section 1
When the reference alignment mode is selected by 2, the reference alignment instruction section 12 causes the display screen 1 of the display device 11 to
Display the touch image at the reference positions A and B above,
Indicates the correct touch position to the operator.

As a result, the operator determines the normal viewpoint C when performing an input operation toward the display device 11, and by touching the touch images at the reference positions A and B on the display screen 1, the operator can display the current touch screen. The position (coordinate) data on which the infrared beam on 2 is blocked is detected by touch screen 2 and passed to reference position input section 13 .

On the other hand, the reference position input section 13 inputs and stores coordinate data on the touch screen 2 corresponding to reference positions A and B on the display screen 1.

A plurality of pieces of coordinate data can be stored here by touching the reference positions A and B, respectively.

The touch input operation for the reference position is completed by canceling the reference position alignment mode.

At this time, at the timing of canceling the reference position alignment mode, the conversion coefficient calculation unit 14 averages the coordinate data stored in the reference position input unit 13, and calculates the relative position between the position on the display screen 1 and the position on the touch screen 2. The relationship is determined.

Note that the averaging of coordinate data referred to here means that the maximum and minimum values of the stored coordinate data are discarded, and the average of the remaining data is calculated to determine the optimum value for the reference positions A and B. This is to obtain coordinate data on the touch screen 2.

Further, the relative relationship between the position on the display screen 1 and the position on the touch screen 2 is determined as follows.

First, the optimal coordinate data on the touch screen 2 for the reference positions A and B on the display screen 1 determined above are (X,,Y,), (xb, Yb
) and the origin on the touch screen 2 is H (0, 0>), then the distance from the origin H is the parallax rate of the position on the touch screen 2 corresponding to the reference positions A and B on the display screen 1. is.Here, L-, L-a, are the lengths of the touch screen 2 in the horizontal and vertical directions, and C7m
is the total number of coordinates on the touch screen 2.

Also, from the above equation (1), the distance from the midpoint of positions Xa and Xb on the touch screen 2 corresponding to the reference positions A and B on the display screen 1, which is one of the relative relationships, to the origin H is: This is seen from the operator's point of view, which is another relative relationship. Here, L and L are the lengths in the horizontal and vertical directions on the display screen.

By calculating the above equations (1), (2), and (3), the relative relationship between the position on the display screen 1 and the position on the touch screen 2 is determined, and these data are transferred to the position conversion unit 15.
is memorized.

From now on, by touching the touch screen 2,
The coordinate data from the touch screen 2 is transferred to the position conversion unit 15.
As a result, the position conversion unit 15 uses the relative relationship determined by the conversion coefficient calculation unit 14 to convert the display screen 1
converted to the upper position.

In other words, the coordinate data from touch screen 2 is (X,
, Y,), the coordinates (X, Y) on the display screen are as follows. Here, C,, C, is the total number of coordinates on the display screen 1.

Coordinate data (X, Y) on display screen 1 obtained above
is passed to the touch data processing device 16 as touch data at a regular position, and various data processing and arithmetic processing are performed thereon.

As mentioned above, the relative relationship between the position on the display screen and the position on the touch screen takes into account the difference in parallax due to the difference in the operator's viewpoint, so Since the coordinate data from the touch screen 2 is converted into the coordinate data on the display screen 1 based on this, extremely accurate touch screen input operations can be performed.

It should be noted that, although the above embodiments are related to an infrared type touch screen, the touch screen used may be a pressure sensitive type or other type touch screen.

[Effects of the Invention] As explained above, according to the present invention, by selecting the reference alignment mode, touch images are displayed at a plurality of reference positions on the display screen to prompt the operator to touch,
This determines the appropriate relative relationship between the position on the display screen and the position on the touch screen, including parallax correction, and uses this relative relationship to convert the position touched on the touch screen to the position on the display screen. Therefore, the poor operability caused by the distance between the detection position and the display position as in the past is eliminated, and extremely accurate touch screen input operations can be performed.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an embodiment of the touch screen input device of the present invention, FIG. 2 is an explanatory diagram showing the relationship between the position on the display screen and the position on the touch screen in the above embodiment, and FIG. The figure is an explanatory diagram of the principle of a general infrared type touch screen device. 1...Display screen 2...Touch screen 11...Display device 12...Reference position alignment instruction section 13...Reference position input section 14...Conversion coefficient calculation section 15...Position conversion section 16...Touch data processing unit, patent attorney Yasuo Miyoshi '143 diagram

Claims (1)

[Claims] A display device using a CRT or liquid crystal panel, etc., a touch screen that generates a signal corresponding to the position when the display screen of this display device is touched, and multiple positions that are touched on the display screen during reference alignment mode. a reference position input section for inputting the correspondence between the position on the display screen and the position on the touch screen; and a reference position input section for inputting the correspondence between the position on the display screen and the position on the touch screen; a conversion coefficient calculation unit that determines the relative relationship between positions on the screen; and a position conversion unit that converts a position touched on the touch screen to a position on the display screen according to the relative relationship when in a mode other than the reference alignment mode. A touch screen input device comprising: