JPH03220619A - Touch screen input system - Google Patents

Abstract

PURPOSE:To prevent erroneous input by displaying a detected touch position on a screen at the time of detecting the touch position with a touch sensor and fetching the detected position for detection-off of the touch sensor into the device main body side as input position data. CONSTITUTION:A touch position teaching means 5 which teaches the touch position on an input screen to an operator is provided, and the detected position is displayed on the screen when a touch sensor detects the touch position, and the device main body side fetches the detected position for detection-off of the touch sensor 4 as input position data. That is, when the operator touches a desired position, a cross hair cursor is displayed in this position to teach the touch position; and when the touch operation is stopped and the touch sensor 4 is turned off, the cross hair cursor is erased and input position data is sent to the device main body side. Thus, an erroneously touched position is not erroneously recognized as input position data on the device main body side, and accurate touch input is available.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a touch screen input method that can prevent erroneous input and improve the resolution of a touch sensor.

(Prior Art) A touch screen input method has been known in which an operator touches an input screen displayed on a CRT screen to provide input position data to the main body of the apparatus.

FIG. 4 shows the configuration of a touch sensor portion to which this conventional method is applied.

The conventional example shown in the figure is a touch sensor in which an infrared light emitting element and a light receiving element are arranged facing each other on the four sides of the display screen 2 of a CRT, and the touch position on the CRT screen 2 is optically read. It is.

That is, in this conventional example, when the operator touches the CRT screen 2, the infrared rays 3 are blocked, the light receiving element in that area is turned off, and the X, Y
) is notified to the device main body side as data. The device main body side recognizes the input position data (X, Y) and executes predetermined processing.

(Problems to be Solved by the Invention) However, the above conventional example includes the following problems.

For example, if an operator intends to touch a desired display part with his or her index finger, but his thumb touches another display part first, the device main body uses the touch position of the thumb that was touched first as position data. This caused a problem in that the operator was recognized and a process was executed against the operator's wishes.

In particular, since the display surface 2 of the CRTI is spherical as shown in FIG. 4, there is a gap between the touch sensor attached to the front surface of the CR7 screen and the actual screen.

In this case, if you do not touch the screen perpendicularly, a point different from the point you actually attempted to touch may be input, and a certain amount of skill and practice is required to perform accurate input.

In addition, since the input data of the touch position detection device is processed as it is as the touch position, fine adjustment of the position cannot be performed, so if the resolution is increased beyond the size of the touching finger, there will be many errors in detecting the touch position. It was not possible to increase the resolution of the sensor very much.

An object of the present invention is to provide a touch screen input method that can prevent the above-mentioned erroneous inputs as much as possible and increase the resolution of a touch sensor.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the present invention provides a touch screen input system that provides input position data to the main body of the apparatus when an operator performs a touch operation on a displayed input screen. In this method, a touch position teaching means is provided for teaching the operator the touch position on the input screen, and while the touch sensor is detecting the touch position, the detected position is displayed on the screen, and the touch sensor is displayed on the device main body side. The present invention is characterized in that the detected position at the time when the detection is turned off is taken in as the input position.

(Operation) According to the present invention having the above-mentioned configuration, when the operator touches a desired location, for example, a cross is displayed on the touch area, and the touch position is taught.

When the operator stops the touch operation and the touch sensor turns off detection, the red crane disappears from the cross and the input position data is sent to the main body of the apparatus.

This enables accurate touch input without erroneously recognizing a erroneously touched position as input position data on the device main body side, and it also becomes possible to improve the resolution of the touch sensor.

(Embodiment) FIG. 1 is a configuration block diagram showing an embodiment of a touch screen input device to which the method of the present invention is applied.

As shown in the figure, on the front side of the CRT1 there are
A touch sensor 4 consisting of an infrared light emitting element and a light receiving element is provided in each direction, and the CR
When a touch operation on the T screen is detected, the detection signal is taken into the touch position detection device 5.

The touch position detection device 5 inputs the detection signal from the touch sensor 4 in real time while the operator's finger is within the detection area of the touch sensor 4.

It also generates a buzzer sound for a detection response, and also notifies the cursor display control section 6 and calculation section 7 of a touch-on signal and its detected position data during touch-on, and a touch-off signal when touch-off occurs.

When the cursor display control unit 6 receives a touch-on signal output from the touch position detection device 5, the cursor display control unit 6 moves a cursor to the cross on the CRTI screen via the CRT driver 8 according to the detected position data. indicate.

In this embodiment, a plant flow display control section 9 is connected to the CRT driver 8, and this plant flow display control section 9 displays picture data 10 displayed on the CRTl and process data accumulated from the plant terminal. 11 is input to control the display.

The calculation unit 7 recognizes the touch position as a human point only when a touch-off signal is output from the touch position detection device 5.

Next, the operation of this embodiment will be explained with reference to the flow chart of FIG.

When the touch position detection device 5 receives the detection signal from the touch sensor 4, it emits a buzzer sound and notifies the cursor display control section 6 and calculation section 7 of the detected position data along with a touch-on signal indicating that a touch is in progress. Further, when a touch-off occurs, a touch-off signal is notified to the cursor display control section 6 and the calculation section 7.

When the touch-on signal and detection position data are input, the cursor display control unit 6 displays a loss hair cursor 12 at the input position as shown in FIG. 3 (step STI, 5).
At the same time as T2), the calculation unit 7 inputs the touch position (Step 5T3).

Next, it is monitored whether the touch input is off, that is, whether a touch-off signal has been input (step 5T4), and if a touch-off signal has not been input yet, it is then determined whether or not there is a change in the touch position. (Step 5T5)
.

If there is a change in the touch position, the previous crosshair cursor is erased (step 5T6), and the crosshair cursor 12 is displayed at the current input position (step 5T2).

In this way, the crosshair cursor 12 is displayed at the touch position until the touch-off signal is input.

When the touch-off signal is input, the calculation unit 7 first inputs the touch position of Y (input position data).
(Step 5T)
7).

According to this embodiment, when the operator's fingertip is within the detection area of the touch sensor 4, the crosshair cursor 12 is displayed to indicate the touch position, so the touch position can be confirmed. You can perform accurate touch input while using the touch screen.

In addition, delicate touch position adjustment is possible, and as a result,
Since a large number of touch sensors 4 can be arranged, the resolution can be greatly improved.

In this embodiment, a cross cursor is shown as the touch position teaching means, but the present invention is not limited to this, and the present invention may also be used, for example, by inverting or blinking other cursors such as a cross cursor or the touch position. It may also be possible to teach by

Further, although an optical type touch sensor has been described as an example, the present invention is of course applicable to other capacitive type and resistive type touch sensors.

Further, in this embodiment, the touch position detection device 5 outputs a touch-on signal and a touch-off signal to notify touch-on and touch-off, but only touch position data is output, and touch-on and touch-off signals are outputted from the touch position detection device 5. It may be determined.

[Effects of the Invention] As described above, according to the present invention, erroneous input can be prevented as much as possible, and the resolution of the touch sensor can be improved.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of a device to which the method of the present invention is applied, FIG. 2 is a flowchart explaining the operation of the embodiment, and FIG. 3 is an explanatory diagram showing an example of displaying a crosshair cursor. FIG. 4 is an explanatory diagram showing the arrangement relationship between the optical touch sensor and the CRT screen. 1...CRT 4...Touch sensor 5...Touch position detection device 6...Cursor display control section 7...Calculation section 8...CRT driver

Claims (1)

[Claims] In a touch screen input method in which an operator performs a touch operation on a displayed input screen and the input position data is given to the device main body side, a touch position teaching means for teaching the operator the touch position on the input screen is provided, and a touch sensor is provided. While the touch sensor is detecting a touch position, the detected position is displayed on the screen, and the detected position at the time when the touch sensor turns off detection is taken in as input position data on the device main body side. Touch screen input method.