Capacitive touch panel

Abstract

The subject of the present invention is to provide a capacitive touch panel that is inexpensive and excellent in visibility without arranging a resistor or detection electrode formed of a transparent material in an input operation region. The solution of the present invention is to support the transparent input operation panel in which the input operation area in the opening is formed of a transparent body so as to cover the opening of the opening on the insulating support body, and the transparent input operation panel is connected to the periphery of the opening. In this way, a plurality of detection electrodes are arranged on an insulating support plate, and an AC detection signal inputting the relative potential change between the operating body and each detection electrode is transmitted by the transmission device. The receiving potential of the AC detection signal expressed by the detection electrode is proportional to the electrostatic capacitance which is inversely proportional to the distance between the detection electrode and the input operating body, so the AC detection signal expressed by a set of detection electrodes opposite to the opening is proportional to the electrostatic capacitance. The input operation position of the input operation body in the opposite direction is detected by the relative ratio of the received potential. The detection electrode for detecting the input operation position is not arranged in the input operation area, so the detection electrode can be formed without using a transparent conductive material.

Description

technical field [0001] The present invention relates to a capacitive touch panel that is arranged on a display and detects an input operation position of an input operation object such as an icon displayed on the display when a pointer input operation is performed. A capacitive touch panel that detects an input operation position based on the arrangement position of a detection electrode where the capacitance of a finger increases. Background technique [0002] The touch panel used as a pointing device such as an icon displayed on the display of an electronic device has different detection methods for the input operation position, such as electrostatic capacitance method, resistive film method, optical method and other detection methods. The control panel is known. Among them, in the resistive touch panel, a resistive film with a uniform resistance value per unit length is arranged along the input operation surface, and the distance between the detection electrode and the i...

AI Technical Summary

Problems solved by technology

[0005] The change of the electrostatic capacitance caused by the input operation body being close to a specific detection electrode is very small, and is inversely proportional to the distance between the input operation body and the detection electrode. Therefore, in the electrostatic capacitive touch panel related to Patent Document 1, the detected Many X-side detection electrodes and Y-side detection electrodes for capacitance changes are arranged close to the input operation area near the input operation position, and these detection electrodes are formed of a transparent material so that the display on the rear side can be visually observed. Therefore, similar to the resistive touch panel, there will be a problem that the cost will increase, and the transmittance will decrease, making the display difficult to see clearly.

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