Signal screening method of touch device

A screening method and touch device technology, applied in the field of signal screening, can solve the problems of abnormal sensing signals of capacitive touch devices, misjudgment of electronic devices, waste of power, etc., achieve good noise removal effect, and reduce system erroneous actions opportunities, and the effect of low implementation costs

Active Publication Date: 2009-11-25
HTC CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the capacitive touch device will generate abnormal sensing signals (noise), which will cause misjudgment of the electronic device and cause waste of power

Method used

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  • Signal screening method of touch device
  • Signal screening method of touch device
  • Signal screening method of touch device

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Embodiment Construction

[0029] When a capacitive touch device (such as a touch screen or touch pad) generates noise due to radio frequency interference sources or environmental factors, there are usually multiple points (sensing areas) that output signals at the same time, and the sensing areas usually have random The phenomenon of distribution occurs, and the change of its signal strength will not be regular. This is because the impact of noise or interference sources on the touch device is not linear and has an unpredictable relationship. On the other hand, if a conductor such as a finger or a stylus is used to touch the touch device, the touch signal usually forms a single point or occurs in an adjacent area, and the signal strength of the sensing area is usually from the inside to the outside. Or step down in a specific direction. The present invention uses the difference between the noise and the signal generated by the finger to remove the noise by means of the distribution state of the signal...

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Abstract

The invention discloses a signal screening method of a touch device. The method comprises the following steps: acquiring a touch signal; acquiring signal intensity values corresponding to a first induction area, a second induction area and a third induction area according to the touch signal, wherein the second induction area is positioned between the first induction area and the third induction area; and if the signal intensity value of the second induction area is less than the signal intensity values of the first induction area and the third induction area, removing the touch signal. The signal screening method can remove noise of the signal so as to improve the accuracy and the stability of a capacitance touch device.

Description

technical field [0001] The present invention relates to a signal screening method, and in particular to a method for removing noise generated by a capacitive touch device due to radio frequency interference sources or environmental factors. Background technique [0002] In order to make portable information products have a more user-friendly interface, integrating a touch panel (Touch panel) or a touch pad (Touch pad) has become a trend. Relevant panel manufacturers and IC design companies have listed touch panel technology as a major research and development project, and related technologies and products have also been applied to daily electronic products, such as mobile phones, computers and personal mobile assistants and other information products. [0003] Currently, the most commonly used touch devices are mainly divided into resistive and capacitive. The main working principle of the capacitive touch device is to sense an electrical characteristic called capacitance. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/044
Inventor 陈锡坤
Owner HTC CORP
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