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Liquid recognition method for touch panel

A touch panel and liquid recognition technology, applied in the input/output process of data processing, instruments, electrical digital data processing, etc., can solve the problems of misjudgment of noise as touching objects, interference capacitance, etc.

Active Publication Date: 2017-06-30
ELAN MICROELECTRONICS CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Since the capacitive touch panel judges the presence or absence of a touch object based on the change of capacitance, it is easily affected by the noise of the use environment to interfere with its capacitance, and the noise is misjudged as a touch object

Method used

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  • Liquid recognition method for touch panel
  • Liquid recognition method for touch panel
  • Liquid recognition method for touch panel

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Experimental program
Comparison scheme
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Embodiment Construction

[0032] To improve the accuracy of identifying the presence of liquid on a touch panel, see figure 1 and figure 2 , the present invention includes the following main steps:

[0033] Judging that there is no touching object on the touch panel 10 (S10);

[0034] Read at least one full-point sensing frame (S11), and scan the touch panel 10 in a mutual capacitance scanning manner to obtain the full-point sensing frame;

[0035] Calculate the number of effective sensing points (S12). In each full-point sensing map frame, consider the sensing point whose sensing value exceeds a liquid sensing value as an effective sensing point, and calculate the number of effective sensing points; and

[0036] Identifying the liquid object (S13), and identifying the presence of the liquid object when it is judged that the number of effective sensing points exceeds a preset threshold (S14).

[0037] When it is recognized that there is a liquid object, the controller 11 of the touch panel 10 will ...

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Abstract

The invention relates to a liquid identification method for a touch panel. After judging that there is no touching object on the touch panel, the touch panel is scanned by a mutual capacitance scanning method to obtain a full-point sensing frame, and each full-point In the type induction map frame, the sensing point whose sensing value exceeds a liquid sensing value is regarded as an effective sensing point to calculate the number of effective sensing points. If the number of effective sensing points exceeds a preset critical value, it will be recognized A liquid object is present; in this case, the liquid sign can be marked to rule out the presence of liquid on the touch panel interfering with the operation.

Description

technical field [0001] The invention relates to an object recognition method for a touch panel, in particular to a liquid recognition method for a touch panel. Background technique [0002] Since the capacitive touch panel judges the presence or absence of a touch object based on the change of capacitance, the capacitance is easily disturbed by the noise of the use environment, and the noise is misjudged as a touch object. [0003] Regarding the issue of noise interfering with capacitance, the controller of the touch panel has set flags (Flag) of different noise types for the controller to eliminate noise interference when the controller executes the report program, and the noise caused by liquid In terms of interference, the current touch panel controller is set with a liquid flag. Once it is judged from the touch signal that there is liquid on the touch panel, the liquid flag will be marked. When the controller executes the follow-up reporting program , it will judge that...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/044
Inventor 黄荣寿吴珈穆
Owner ELAN MICROELECTRONICS CORPORATION
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