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Touch key signal processing method and device, and computer-readable storage medium

A signal processing device and signal processing technology, applied in the direction of electrical components, pulse technology, electronic switches, etc., can solve problems such as failure to judge normally, exceeding the preset range, etc., and achieve the effect of avoiding misjudgment of trigger events

Active Publication Date: 2022-02-11
SHANGHAI EASTSOFT MICROELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, due to the influence of factors such as temperature, humidity, and electronic device loss, after the touch key control chip system has been running for a period of time, the touch key may not be able to judge normally because the amplified sampling time data exceeds the preset range. trigger

Method used

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  • Touch key signal processing method and device, and computer-readable storage medium
  • Touch key signal processing method and device, and computer-readable storage medium
  • Touch key signal processing method and device, and computer-readable storage medium

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Embodiment Construction

[0030] Currently, a touch key and a reference capacitor are provided in a touch key control chip using a charge transfer method. For each touch key, there is a corresponding inductive capacitance Cp in its corresponding metal keyboard. When multiple touch keys are provided on the same chip, the switch circuits corresponding to the touch keys are sequentially closed by means of time division multiplexing, so as to detect whether the touch keys are triggered.

[0031] Each touch button has a switch circuit corresponding to one of them. When the switch circuit is closed and no finger touches the touch button, the reference capacitor Cx is charged through the sensing capacitor Cp until the voltage on the reference capacitor Cx reaches a predetermined value. Calculate The time of the whole charging process. Capacitance C on the finger finger (hereinafter referred to as Cf) is the parasitic capacitance between the human body and the ground. When the finger touches the touch button...

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Abstract

A touch button signal processing method and device, and a computer-readable storage medium, the method comprising: acquiring sampling time data, the sampling time data is calculated from the actual sampling time and a preset amplification factor; the sampling time data Perform filtering processing to obtain filtering time data; detect whether the touch key is triggered; when it is detected that the touch key is not triggered and the filtering time data is greater than a preset first threshold, reduce the amplification factor , until the filtering time data obtained according to the reduced amplification factor is not greater than the first threshold. The above solution can effectively determine whether the touch button is triggered.

Description

technical field [0001] The invention relates to the field of touch key control, in particular to a touch key signal processing method and device, and a computer-readable storage medium. Background technique [0002] At present, most common touch buttons are based on a capacitive sensing method to sense whether there is a touch operation trigger. The basic principle of the capacitive sensing method is that the touch of a finger will change the capacitance value of the sensing capacitor Cp. In the prior art, capacitive sensing methods include charge transfer methods. For the charge transfer method, there is a reference capacitor Cx, and the change in capacitance on the capacitor Cp is detected by collecting the charging time of Cp to Cx, and then it is judged whether a button event occurs, that is, whether the button is triggered. [0003] In the prior art, the charging time data of Cp to Cx is usually small and may not be directly used for data processing. In practical appl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03K17/96
CPCH03K17/962
Inventor 严祺圣万峰陈光胜
Owner SHANGHAI EASTSOFT MICROELECTRONICS