JPS62236023A - Position detecting method for touch input device - Google Patents

Abstract

PURPOSE:To improve the test accuracy by performing a touch operation by means of a conductor stylus via the conductive rubber and therefore always securing the touch of the same place when the position detecting accuracy, etc. are tested. CONSTITUTION:The conductive rubber 2 is set at a prescribed position on an input panel 1 and then a conductive coating material 3 is applied on the surface of the rubber 2. Then a conductor stylus 4 grounded via a capacitor C of about 100pF has a contact and no contact onto the material 3 to perform the equivalent touch operations. Thus the stylus 4 has a fixed touch position at all times owing to the presence of the rubber 2 set at a prescribed position. As a result, the accurate test result is obtained.

Description

[Detailed Description of the Invention] [Summary] The present invention aims to improve the accuracy of the test by always touching the same place when testing the position detection accuracy etc. of a touch input device. The goal is to be achieved by touch operation using a conductive needle through conductive rubber.

[Industrial application field]

The present invention relates to a position detection method in a touch input device.

In a touch input device, the capacitance when an input panel is touched is detected, and the touch position is thereby detected. In this case, using a capacitance measuring device such as a CR oscillator, the equivalent capacitance seen from the touch position in the front, back, left and right directions is measured, but this equivalent capacitance is measured at the coordinate position (
touch position). That is, the charging/discharging signal period of the CR oscillator changes when a touch operation is performed, and the ratio of the amount of change when looking left and right (or front and back) indicates the coordinate position. Therefore, the coordinates can be determined by calculating the amount of change via the period measuring circuit.

[Conventional technology]

When testing position detection accuracy and the like in this type of touch input device, conventionally, finger touches have been relied upon.

[Problem that the invention seeks to solve]

However, with this conventional method using finger touch,
It was difficult to touch the same place all the time, and accurate test results could not be obtained.

[Means for solving problems]

The present invention provides a position detection method in a touch input device that can solve the above-mentioned problems, and uses conductive rubber and a conductive needle as a means for this purpose.

For position detection, a conductive rubber is placed at a predetermined position on the input panel of the device, and a conductive needle grounded through a capacitor is brought into contact or non-contact with the conductive rubber from above to perform an equivalent touch operation.

[Effect]

The touch position by the conductive needle is always kept constant due to the interposition of the conductive rubber placed at a predetermined position.

Therefore, accurate test results can be obtained.

〔Example〕

The invention will now be described in detail in conjunction with the drawings.

In the present invention, conductive rubber and a grounded conductor needle are used.
Next, the screen shown in Figure 1 (a)
(Details are explained using the process diagram in BL. When testing the position detection accuracy etc. of the touch input device,
First, as shown in FIG. 1 (al), the conductive rubber 2 is placed at a predetermined position on the input panel l.

Next, as shown in FIG. 1(b), a conductive paint 3 is applied to the surface of the conductive rubber 2 placed on the input panel 1, and then grounded via a capacitor C of about 100 pF. A touch operation is performed equivalently by touching and non-contacting the conductive needle 4.

In this way, the touch position by the four-bar needle 4 is always kept constant due to the interposition of the conductive rubber 2 placed at a predetermined position, so that accurate test results can be obtained.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to accurately test the detection accuracy of a touch input device.

[Brief explanation of drawings]

1(a) and 1(b) are process diagrams showing a position detection method according to an embodiment of the present invention, in which 1 is an input panel, 2 is a conductive rubber, C is a capacitor, and 4 is a conductor needle.

Claims (1)

[Claims] In a position detection method that measures human body capacitance and thereby detects a touch position on an input panel, a conductive rubber is provided, the conductive rubber is placed at a predetermined position on the input panel, and the conductive rubber is placed on a predetermined position of the input panel. A position detection method in a touch input device, characterized in that a touch operation is performed equivalently by contacting a conductive needle grounded via a capacitor.