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Electrostatic capacitive touch panel

A technology of electrostatic capacitance and touch panel, which is applied in the direction of electrical digital data processing, instrumentation, input/output process of data processing, etc., can solve the problem of detection sensitivity reduction, achieve the effect of reducing the impact and suppressing the reduction of detection sensitivity

Active Publication Date: 2017-09-01
ALPS ALPINE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is a problem that the change in voltage when the fingertip touches the operation surface becomes small, and the detection sensitivity decreases.

Method used

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  • Electrostatic capacitive touch panel
  • Electrostatic capacitive touch panel
  • Electrostatic capacitive touch panel

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Experimental program
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Embodiment Construction

[0037] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. refer to figure 1 , to describe the electrostatic capacitive touch panel. figure 1 It is a schematic plan view of the capacitive touch panel according to this embodiment. figure 2 yes figure 1 A schematic cross-sectional view along the line A-A. In addition, in the following description, although the finger is described as the detection object of the capacitive touch panel, it is not limited to this object. The detection target of the capacitive touch panel may be any dielectric material.

[0038] figure 1 as well as figure 2 The illustrated capacitive touch panel 1 is an element used in various electronic devices such as display devices, communication devices, and portable devices, and functions as an input device for operating various electronic devices. The capacitive touch panel 1 is provided with an X electrode pattern 3 composed of a plurality of ...

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Abstract

The present invention provides an electrostatic capacitive touch panel that suppresses the reduction of detection sensitivity and reduces the influence of floating conductors. In this electrostatic capacitive touch panel (1), the drive electrodes (27) and the detection electrodes (28) are arranged on one side of the substrate (2) according to the capacitive coupling mode, and by applying a drive voltage to the drive electrodes, according to the capacitive coupling The detection voltage is outputted through the detection electrode, and the presence or absence of an object on the substrate is detected based on the detection voltage of the detection electrode. On one side of the substrate, a ground pattern is arranged so as to avoid the distance between the driving electrode and the detection electrode ( 5).

Description

technical field [0001] The present invention relates to an electrostatic capacitive touchpad (touchpad) used for a display device, a communication device, a portable device, and the like. Background technique [0002] The drive electrodes for voltage application and the detection electrodes for voltage detection of the capacitive touch panel are arranged on the substrate. When the fingertip touches the operation surface, the capacitance between the drive electrode and the detection electrode changes, and the existence and coordinates of the fingertip are detected based on the decrease of the detection voltage output from the detection electrode. In general, a capacitive touch panel performs calibration when it is determined that there is no finger on the operation surface, and the detected voltage at this time is set as a reference voltage for determination. When a finger touches the operation surface and the detection voltage drops, the calibration is restricted so as not ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/044
Inventor 高木政史重高宽高桥宽明
Owner ALPS ALPINE CO LTD