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Static capacitance type touchpad

A technology of electrostatic capacitance and touch panel, applied in the direction of electric digital data processing, instrument, 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: 2014-09-24
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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  • Static capacitance type touchpad
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  • Static capacitance type touchpad

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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 invention provides a static capacitance type touchpad capable of inhibiting the detection sensitivity and reducing the influence of a floating conductor. In the static capacitance type touchpad (1), d driving electrode (27) and a detection electrode (28) are distributed on one surface of a substrate (2) in a capacitance coupling manner, a driving voltage is applied to the driving electrode, a detection voltage is outputted via the detection electrode according to capacitance coupling, whether there is an object on the substrate or not is detected based on the detection voltage of the detection electrode, and grounding patterns (5) for avoiding the driving electrode and the detection electrode are arranged on one surface of the substrate.

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